Just so I can get a handle on what you are seeing.....
1. You've set the edit filter to "Audio Transients"
2. You can see transients as hollow diamonds with tails? Everywhere, even on silence?
Here's a few ideas.
Do you have the pool active? Right click context menu with either the M:B:T or Clip options checked? Showing the pool? (Same menu)
Have you at any stage merged and locked markers?
What happens if you use the filter control? Turn down the threshold or adjust the resolution? Does that change anything?
If it is really screwy in every project on every track it may be something more than just audiosnap like an install issue.
The only time I've ever had issues with audio snap is working on tracks that haven't been tidied up and bounced down prior to turning audio snap on. As soon as you get any errant noises such as studio outtake at the front of clips audiosnap then becomes problematic because of the false transients that are there.
They can be the cause of the dreaded "Beats out of range" message. Trim the clips and bounce them or apply trimming before you do anything else and see if that helps.