In reply to dakidunn:
> fit the correct size chain,
Was it the wrong width (9 speed instead of 10 say?) or the wrong length? It might help if the other shop was willing to give a written statement of what was wrong.
> When I take the front wheel off the bike to transport it in my car, I shim the gap in the brakes and when I reattach the front wheel, I need to adjust the brake mech as it shifts every time.
This sounds like what Hardonicus is talking about, the wheel not being properly centred.