I've been using Lightroom (whatever the most recent version has been) for the past 4 years. I know how most ins and outs, but now I'm truly stumped. I'm editing a large batch of images and selecting a group to "sync" all the settings (as I always do), letting the system run (not hitting cancel, etc) and when I go through all the synced photos they are not all actually synced, they're still at previous settings. Some sync, and some don't. I've fiddled with as many things as I can to try and figure out the issue but I can't. HELP! This is slowing my editing waaaay down!!