Can you post the mod number of both the outdoor, and indoor unit.
The rep may have been from Bryant, or the distributor.
You charge may not be right and could cause the humidity to be high.
The new system is a higher seer, and as such does not remove as much humidity as your old system, that was (guessing here) about 7 seer.
When the unit runs, does it seem to blow more air then the old unit did.