Good news. Times were off all day yesterday so this time I removed the extensions instead of just disabling them. Restarted the computer and everything looks good. I’ve even gotten past the dreaded 7 - 7:30 am flip.
If anything changes I will let you know.
Edit: Checked my email at 9 am. Both have flipped.
Left my computer open overnight. At 8 pm last night both email providers were 6 hours ahead. At 4 am, Earthlink was the right time and ProtonMail was ahead. Restarted computer at 7 am. Both emails were the right time. Checked again at 9:30 am and both had jumped ahead.
Edit: as of 12/25 I have had 4 days of the right times on my emails. Thanks.
An update. I was trying to leave Brave open 24/7 with my email accounts open. I put my computer to sleep, last thing in the evening, and the timestamp sometimes is off 6 hours when I wake up my desktop. I have found that if I close Brave and reopen, the timestamps are then corrected.
Hope this helps someone else with a similar problem.