Unable to delete more than one photo at a time

Capture one pro

Build 16.3.1.23

27”iMac 2019

3.7GHz intel core i5

Radeon Pro 580X 8GB

64GB 2667 MHz DDR4

Sonoma 14.6.1

I have been having an issue for quite a while and can’t figure out what's going on. When selecting a group of photos in Capture one pro, and then trying to delete them, Capture One only applies that action on one photo. The Photo that’s deleted has a thicker white boarder, while the unaffected photos have a thinner white boarder.

This is something that I could easily do in the past. I don't know what happened.I use the plus or minus keys for culling my photos. After going through all of the photos, I then choose “select by color” from the right click button, and pick the red color, and then choose “delete from disk”. All my unwanted  shots are gone. 

Now, when i choose  “delete from disk”, only one photo of the selected are deleted..

This also happens when using the shift click, or command click method. One of the photos has a thicker white boarder than the rest, and that photo is the one deleted.

Thinking it might be an issue with my computer, I have updated my Mac OS twice. I’m now running the latest version of Sonoma. The problem is still there.

This is the only software where this is happening.

I have a feeling it’s something simple that i’m missing. 

I have thousands of photos that I would like to delete without deleting them one by one.

Please help.