Certain keys aren't responsive unless I use them with SHIFT or FN KEYS

Originally I thought my keyboard was starting to break and my "e", "3", "f3", and "f4" keys are becoming unresponsive. I have to press them multiple times for them to work. However today I noticed that the "e" and "3" keys are always responsive when I use shift. Same goes for f3 and f4 when I use fn with them. Anyone know what's wrong? I checked that sticky, slow, mousekeys are all off
 
Back