For some reason in AE 2014 the 1 and the 2 keyboard buttons (not on the numeric keypad) retreat and advance 1 frame, respectively, instead of jumping to their appropriate timeline markers. I looked through the keyboard shortcuts pref, and to my layman's eye, I found no connection where this should be taking place. Has anyone else had this sort of strange keyboard error? Would love to know how to fix it, as I use timeline markers all of the time.
You need to provide exact system info and details like what language and keyboard mapping. Also look into other tools on your system. E.g. using a tablet may assign global shortcut keys that may interfere with normal keys.