Wow every time i read your posts I decide your place sounds just like ours!
I also struggle to put my knowledge from the keyboard with the pretty stickers to the regular piano with no stickers. Yet my kiddies have no trouble with it at all. It doesn't make sence to me but obviously I relyon the visual support more than they do and they are the reason we put stickers on in the first place!
I am pretty sure all need is more practice with out stickers. But after thinking about it I decided I don't really care. I figure at some point when I have memorized enough songs I will spend a day at school ( on the nice piano) with key guides until I figure it out. Until then I cause my crux
The missing key would drive me batty! I have an old old keyboard ( I had it as a child!) and occasionally it wont sinc to softmozart and we will be unable to play a note in a song. It is incredibly frustrating!
Your are doing great. Any practice at all is better then no practice and even if all you have tine for is run through the song once apon waking that is better then a big session once a week.