OK, that's eliminated, but you still need to deal with the U joint issue. Get the combo U joint that will fit both driveshaft and the larger yoke on the diff.
I guess if you have the wobble on one side, I would start looking at the new bearing install and make sure it's centered/seated. Is the brake drum seated properly around the center register?
Did the axle appear bent in anyway when you changed the bearings? Or did you buy it that way?