Your babies are adorable. Whether their ears are up or down, or their tails are short or long, or any other differences they may have, ALL yorkies are just too dang lovable and irresistable. Until I saw Roxy, I had no interest in a small, yappy lap dog. I loved big, furry, wrestle-with dogs. What was I thinking?
I have yet to see a picture of a yorkie on here that I didn't wish I had for my own. Each one has it's own facial expression and personality. Roxy's ears are constantly going up and down, so I really don't know whether she's erect earred or floppy. Today, she has one up and one down. I don't want to cut the hair on them because they look like angel wings when they are up so maybe it's the weight of the hair. And a long tail makes it easier to catch than when they chase a little stub.
So, unless you are showing or breeding, then who cares? They are our babies, and we love them. (Some of the pics I've seen, are, IMO prettier than the show dogs, and that's the truth!)