Sink Tailpiece Doesn't Line Up With New Trap - Need Help Making Connection
You should not have used that type of trap. You should have used an adjustable P-Trap, which gives a whole bunch of horizontal adjustability: 



It's probably not too late, you could cut that trap off and glue the 1 1/2" male adapter (included in the trap kit) to your drain pipe stub-out.

Each and every suggestion and direction given by the salesperson at the "big box" hardware store should be met with outward courtesy but inward scepticism. A good plumbing shop would have never sent you home with all those glue fittings.