It looks like you've done lots of takes. It also looks like the area that you have selected to do those takes encroaches on the original WAV. To avoid this happening, split the original take and create a blank space where you need to do the new take. The zoom in and select the area for the new takes, making sure there is no overlap with the original take.
To fix what you have already, select the take on which the original wav form exists, right click, and select "crop to active take".