Control Key Always Pressed?

This starts from last week when I used a Made in China wireless keyboard set. Last weekend, I used that 2.4GHz keyboard set. I pluged them in, set keyboard and everything worked out fine. After a while, I am not able to do left click anymore. It seems like the control key is always being pressed somehow. When I left click, it always give me a right click. Also, I cannot type anything just like you are not able to type while pressing the control key. I thought it might be the control key is stuck, so I took it from my keyboard and clean it from inside out. Still not working. I checked online, some one says it is a "fat battery" problem, so I removed the battery and it didn't work out. I thought this might be a software problem, I reinstalled the system, and the problem is still there. Actually sometimes after I restart the laptop, I can use it with no problem for maybe 5 minutes. The longest time since that is 1 day without problem, and then same thing happens again. Today I find out that if I use a USB keyboard, everything works out fine. But as soon as I type anything on my macbook keyboard, same problem comes back again. Type again on the external keyboard solves this problem immediately. So I figured out that this is neither a hardware problem nor a software problem, it is probably some firmware changed during I configuring the wireless keyboard. I use a Mid 2010 Makbook Pro 13". The cloest Apple Store is like 3 hours from where I live, could anyone please help me out? Thank you very much!

I find a post here, it seems like he has exactly the same problem like me, but they didn't find a solution as well.

https://discussions.apple.com/thread/2793381