Hi Candi
Well this is another case of the server doing you a big "favor"

giving you loads of wonderful SBs when what you want is a more dominant fur. Now if you were trying for SBs then you'd be tearing your hair for them giving only Red Masks.
This is commonly known as Sod's Law and i often wonder if KCR didn't find a way to write it into the database in a moment of gleeful perversity.
This also shows how in fact, while we think it's difficult to breed out recessive traits it can be even more difficult trying for dominants as most who've taken on this task have found.
Without going into all the details your best bet is still breeding Red with Red, the odds being higher
for them to produce their shown than their hidden fur.
Also, if you could find a "pure" Red partner it will be unable to pull out the SB and can only give you Reds.
Hope this helps and good luck