Disregard. I can’t read a clock I guess.
The final slice on Mon-Wed PvP always ends at 3:00pm CST (40 minutes ago). If your clock was showing an additional 3 hours, then that would be a bug.
This event according to my clock lasted only 48 hours, rather than 60. So, yes I thought the event ended early and was lucky I caught the sooner end time by accident by looking at the event tab. I even notified my alliance to keep watch after I noticed it. This event started at noon time for me and ended at noon time two days later. Usually, events starting at noon for me end at midnight two days later.