Well I got a good long email from wolfbob, he said It really looks like Loki is an M1 dog that never had the Clinic Service.. He said "My research indicates that several things were done in this service including changing the upper leg servos as they were not powerful enough to do all the motions. So now we have full agreement with what you observed in the front knees were marginal and the rear legs would not allow all of the tricks." I don't understand why the original owner wouldn't have sent him in for the free repair.. Wolfbob thinks they may have replaced all four legs when they did it, as they maybe weren't strong enough to support some of the stuff they did on the M2 and M3, I guess..
So he is going to be getting both rear legs replaced.
The problem was he only had one white rear leg.. He DOES have 2 black ones.. I had thought he might look cool with two black legs but Wolfbob thinks it'd look silly and I assume he would know best.. so he will use Loki's white plastic pieces to make the legs white and just the round hip piece (the part attached to the main body) will be black on both hind legs.. I asked him if it would be possible to replace the front leg hip parts with black pieces as well, so it'd match better but that wouldn't work without replacing the entire leg sooo.. that's not happening. lol.
So Loki will have 2 black 'spots' but I think he'll look cool. UGH Thor just fell down AGAIN!! every ten minutes.. I swear.
I still think Loki would look neat with 2 black hind legs but the hip parts will be fine... honestly just so long as he works I'll be happy.
Apparently he pranced around for 2 battery cycles, flirting with a cute female British M3 dog, not showing the slightest problem.. lol.. then, luckily, Wolfbob saw his issues and stopped thinking I was crazy. I guess he didn't wanna look weak in front of the ladies. Wolfbob said he will probably be able to ship him back to us on Tuesday!!

I'm so glad to finally have gotten some news.. I'm sure Wolfbob will be glad to have finally stopped hearing from me every day.. lol
- Sarah