Followed instructions from above, deleted the pictures that was causing the issue, restarted LRC but now syncing is stuck on 10 remaining pictures with no apparent sync issues/ errors.
As some people indicated in the past: I'd be glad to hear any tips from you guys, or better yet, some help. It's a complicated issue, and I'd be very happy to make peace with my ever-turning syncing symbol.
Updates to the Adobe Photography Products were released yesterday and include a fix for this issue. Please install the December update, restart your system and verify you are no longer experiencing the issue. Thank you for your assistance in reporting, providing additional information and, most of all, for your patience.