Mine too had one up and one down!! lol it was so cute that i didn't want to tape it... but i also didn't want it like that forever, so i ended up taping it up... I wanted to change the tape everyday, and the after the first day, the ear was up on it's own... we taped it on the 3rd day just to make sure it stayed up and it did... so it's all good now.. My yorkie was 11 weeks when we did that for her... and we got her with the one up ear when she was 9.5 weeks...
my avatar has the one ear down... and i've attahced a pic with the one now with them both up!!
You'll even be able to see that one ear has more hair, cuz we shaved the down ear heheh