Kicks Over Time Problem

Hello. I am having trouble adding kicks over time. I am following the instructions I've found on other forum posts. I enter the notes and rests I want to be above the staff normally in voice 1. Then I exchange them to voice 3 with the voice exchange function under the Tools menu. Then I select the entire measure and toggle rhythmic slash notation. Then I fill the measure with slashes but then that function brings the kicks over time rests down to overlap with the slashes.

I can not figure out a way to keep the rests above the staff with slashes in the middle of the staff. I am going to have to enter the kicks over time and then make voice 1 completely opaque and then draw the slashes in by hand after printing. Sorry if I am not being descriptive enough. Do I need to upload the musescore file? What am I doing wrong? Thank you for your help. I'm trying to improve at Big Band arranging and I am resisting making the switch to Finale.