Sorry to hear you got a lemon. I got mine a few years ago and with my wheels locked it doesn't move around. I guess I wasn't expecting a dining table like sturdy cutting table just judging from the construction and all the metal parts, but then again I don't have the whole table up either just one side and it's against the wall. I never considered this table wobbly. I put mine together all by myself too and I use it for cutting and it's just fine.
I'd take it back too.