Got a reply from Tekno. Apparently they have seen this before where the kit comes with two rear mounts instead of one each. Tekno will be sending me one out. No hard feelings on my part since I am still waiting on electronics and Tekno is going to make it right.

For being my first kit build, I think it went pretty good. Except for when I thought I had a bad spur gear/diff build, heard it rubbing against the top plate, rebuilt the diff, same noise. Turned out there was a small piece of plastic hanging and rubbing on the gear. Should of seem the look on my face. Both before and after. Priceless.