Welcome to YT! On the pee pads, my pups go on them several times before we toss them. I throw them away when I just can't stand it anymore so maybe you just have a picky baby
Teaching down can be difficult, from the sit position drop the treat straight down to the ground and then drag along the ground. If their little butt pops up you can drag it under your hand, leg, or anything low to the ground that will force them to crawl to get it. As soon as they lay down give them the treat and praise like crazy! On the ears, I agree with everyone else. Definitely get to the vet ASAP! Good luck with everything!