yes you should. If they are showing up with hands in their ranges that you aren't accounting for you either (1) suck at forming ranges or (2) need to re-assign their ranges. I'm willing to bet #1 or #2 apply in your situation, and this isn't meant as a flame. Many micro players come in with this claim that villains can have anything, when it's generally not true, and their belief that it is is due in part to their lack of hand reading skills.