No, i do understand, and i wasn't trying to sound ungreatful, and if i did i think it may have been because of the way her post was worded.. it sounded like a very definate 'this IS whats wrong!', but i honestly wasn't trying to be rude..
I'm just very sure that isn't her problem.
The sleeping down stairs is because she still isn't 100% about sleeping all night without needing to go out, and its a little unfair to tell her she needs to go toilet outside and then not give her the opportunity.

Also, i sleep downstairs anyway and would let her sleep in my room, but i keep my skink's viv on the floor and sometimes he sleeps in the open so i don't trust her to be trying to wake him up all night.

I'm still unsure about the crate, she never minded being fed in it or being in it but as soon as you closed they door she'd go mad and the mess really isn't pleasent.
I will definatly try leaving her in a room on her own of growing periods of time so she gets used to the idea, and using the treats, but i really can't stand the idea of locking her up in a crate where she has to sit in her own mess and she could hurt herself.

I'm confident i can deal with the sleeping issues as soon as i'm confident she can sleep all night without needing to go outside, its really just leaving her on her own during the day, which i'd also feel uneasy about leaving her in a crate for because she likes to stretch out and she isn't a bad dog, just needs to know the limits of what she can and can't do, and locking her up seems like a way of avoiding the problem and not really helping the dog.
Just a personal view.

Kong's are a good way of relieving boredom! Doesn't sound like boredom though if she's doing it everytime your backs turned. I don't think its a dominance problem either, destructive behaviour is seldom anything to do with dominance.

Like Andrea said it could be to do with her diet. Her food could be providing too much or too little of certain food groups. Making her hyper or making her search for what she's not getting enough of.

It could also be an attention thing, bad behaviour is best ignored but make sure you give plenty of attention when she's good.

She sounds like she is very dependent on the family and is scared of being on her own, The Kongs are a great idea, i would suggest you smear something very tasty round the inside, such as peanut butter or cream cheese put it down for her, when she is really chewing and licking at it, leave the room for 15 seconds, return pick the kong up, repeat gradually building up the time, just 15 seconds at a time, so she learns to cope with being on her own. Once you've broken the 15 minute barrier you've cracked it.

She just a frightened pup, scared of being on her own.

That sounds a lot more like it.
I will definatly do that once i'm well enough to get to the shops to buy the kong toys.
She's completely mad about food so that should definatly occupy her mind for a bit, bless her heart.
Thank you very much

Anything you can do to build her confidence would be good, she has a few worries at the moment shes worried about being left alone, she worried about your other dog, and can be submissive. I never touch a pup if it is in a submissive state, (lying on its back or raising its back leg), as it saps confidence, i would step back, take the pressure off call it into a sit then stroke and praise. In my experience of working with dogs, jumping up is just another sign of insecurity, the dog trying to appease.

I understand what your saying but fact is she's not a puppy now. At seven months old she's a troublesome teenager manipulating those around her. You say she's submissive but dominance isn't about aggression. Aggression is a result of dominance that has been left to develope in a dog that doesn't have the nature to be the alpha leader. And those dogs tend to be timid shy types to start with. Even dogs that display very submissive behaviour can make their mind up to rule the den.
You say your dads in charge, well that's maybe the case but a true pack leader will have no problem handling a dog in any senario. I'm not having a go here, I only have the information you have written. Sleeping downstairs with your dog is her leading you. From her point of view she sees it as" I destroy I get attention. I'm good I get left alone.
If you really disagree then maybe you need to look at her enviroment. A dog this age needs constant handling. Strong guide lines and boundries to offer a stable enviroment. Young dogs get lost in translation because they don't understand their place in the pack. Don't kid yourself that she's too young to fall into the pack structure, they fall in line from day one.
Also I would maybe take her to the vets. Prehaps you can speak to you vet and he can put you in touch with a behaviourist. I advise you stay clear of listeners though. Two day courses in canine psychology does not quilify anyone. I like the one of the posts author suggestion though just not her weekend workshop qualification.
I'd also advice Jon Fisher books. Not all his advice I agree with but some very useful information and methods. There is insecurity here and firm but calm handlig should make a dog like this grow into a well balanced pouch.

Had another thought. The Barf diet. google it and there's a forum with info on. You can encourage your dog to chew the right things. It's based on a raw meat diet. I feed all my dogs this diet and they are the peak of health for it. I have a eight month old dog who was destructive too. I leave him with a raw bone when I leave him alone. This encourages his food driven natural instinct and occupies his mind for along time. What dog would want to chew teh sofa when there's a juicey raw bone instead.

Why didn't you just "rebalance the pack structure".

Jenny. I don't understand what you mean? The Barf diet was suggested, because the original post has a seven month dog that chews. Apart from getting rid of alot of additives, and stimulants it's a diet that takes a long time to eat and can help occupy and tire dogs.
As for rebalancing the pack structure..?? I suggested that? simple trying to provide the original post with as much help as I can... Or wer eyou being funny? I there's an issue then speak up