Deleting emails. It used to let me click on an email, scroll down and SHIFT+Click another email, jump over 1 or more emails (to keep them), click another email, scroll down and SHIFT+Click another email. I could then click on DELETE and it would delete the groups, and saved the ones I skipped.
Now it randomly selects backwards or forwards and captures the ones I wanted to save and deletes them!!! Especially if you scroll down a few "pages". I'm trying to selectively save and delete my In-Box with 200+ emails! This is crazy!!!!

Try it. Click on 3rd email, SHIFT+Click on 6th email (you made group 1, and are saving the first 2 emails), now click on the 10th email and SHIFT+Click on the 15th. (you made group 2, and are saving 7th,8th,9th emails, and eliminating 10 - 15. On my windows pc it will randomly grab the ones you were saving, or select everything in the entire In-Box... In my case, that's 8,348 emails.... SO FRUSTRATING.