Merging tracks that are already positionally in the right place

[steve]

I wanted to keep the audio that I want to use to replace parts on the first/primary track on separate tracks.

I can’t make sense of that sentence.

Everytime you delete a segment of the audio,which I did,audacity collapses the track screwing up the placement of the tracks.

A couple of options that retain the original timing:

Method 1.

1. Select the part that you want to delete.
2. “Edit menu > Remove Special > Split Delete” (Alt+Ctrl+K)

Method 2.

1. Select the part that you want to delete.
2. “Edit menu > Remove Special > Silence Audio” (Ctrl+L)

I usually use “Ctrl+L” unless I’m wanting to move the clips around later.