The only reason Simply Deep sold semi-well was on the strength of Dilemma. That single was a surprise hit (even Nelly didn't intend to release it as a single yet, but radio was playing it), huge smash, and they rushed Kelly's album in a matter of weeks to capitalize. Simply Deep produced no other hits.
Like This was also a moderate hit for her, and it was R&B.
A lot of people went up for Bad Habit, too.