Hi Kim.
From my reading of some past conversations in this forum, double flowers have been said to be inherited in a dominant manner, to single flowers… see link for one example where this idea has been discussed:
Link: www.rosehybridizers.org/forum/message.php?topid=28206#28209
No… what I wrote is what I meant… single is dominant to double… which is why I was surprised when I got singles out of a double x double cross because I thought doubleness was recessive to single.
Looks like my memory was failingme though… on the link I was talking about (below) it also says double is dominant to single… so mystery solved 
Link: rosehybridizers.org/forum/message.php?topid=12857#12857