Hi Rascal,
1) What do you mean by “the walls are uneven in spots now”?? Physically, or coverage-wise?
2) Exactly what primer did you apply?
If you have “physical” uneveness on the wall, sanding is the only answer. Whether manually, or using a mouse.
** Rinse all dust off & let dry.
** Find & apply GARDZ by Zinsser. This primer penetrates & locks down pastes, etc.
** Then, TWO coats of finish-color!
Good luck,
Faron