When we plug anything into the bottom plug in on 1 particular outlet in our kitchen the lights seem to dim but this didn't happen when you plug anything into the top or any of the other outlets. Why is this happening?
First possibility, a bad receptacle or bad wiring connections to the receptacle. Deal with that fast -- it burns down houses.
Builders often use the cheap 60-cent receptacles, and they are also fond of using "back stab" connections to those receptacles which are terrible. Replace with a $4-tier receptacle which has side screws or screw-and-clamp.