I will answer your questions separately since I have only just seen these later posts. Black is only dominant to chocolate and cinnamon. Perhaps you remember I said those basic colours were at the same locus but red is located on the female chromosome and you are correct in saying it is always expressed but, on occasion, you have to look very hard to find it. The reason the offspring from a cream parent can be red is because cream is only red with the addition of two dilute genes. A cream must pass on one of its dilute genes to all its offspring but you have to have a dilute gene from each parent to produce a dilute cat. So red to blue can produce black because blue is the black gene with the addition of two dilute genes. Again, the blue will only pass on one of its dilute genes to each kitten. If the other parent does not pass on a dilute gene, the kitten will not be dilute.