Didn't see the amounts in parentheses at first. Yeah, your scaling looks about right. Your LHBS employee is probably going to look at you funny when you asking for 1.6oz of three grains.... and 0.6oz of another...
And for the record, I still brew 2.25gal batches. I'm really the only one that drinks beer in my house and I don't drink every day. So hey. I can understand small batch sizes. 1gal is starting to get pretty small though. Just becomes tough scaling down recipes. "Uh yeah, can I have 12 kernels of crystal 60 please?" lol