It's not a "strange" problem at all. At the micros, when bad players notice you raising a lot, they tend to adjust in one of two ways: (a) they start playing back at you like crazy, calling/raising with all kinds of junk, or more commonly (b) they start playing loose/passive, trying to limp in and see a lot of flops, waiting for a big hand so they can "trap this idiot for all his chips". Both of these reactions are very easy to exploit, IF you can tell which one you're up against.
The problem is that the proper ways to exploit the two types are exactly the opposite: against (a) you value bet super thin and never bluff, and against (b) you bluff a lot but can't really value bet without a monster. If you are wrong about which player type you're against you could make some costly mistakes.
My suggestion is, when you start going on a streak, pay special attention to the players at that table and see how they begin to react. You can gain a huge edge by being able to tell which types of players are which, and the ability to tell is something that comes with experience. However until you get better it's generally better to err on the side of being too tight than too loose.