Synchronizing photos in wrong direction

Have been using lightroom for 5+ years and just with this last update, my photos started to sync in the wrong direction sometimes. So when I begin with one photo, it usually syncs to that one with any following pictures I select. Sometimes this is not happening and I end up synchronizing in the wrong direction basically

Also I can no longer consistently use a shortcut, Command + Right or Left Arrow to select photos, but instead this command works only sometimes, and other times sends me to the top or bottom of my catalog, which is very frustrating as I lose my place in editing. 

Anyone have remedies to this where I can edit my settings or shortcuts?

They're minor inconveniences, but when you're combing thousands of photos a week, it really slows you down.