Hello, I have been lurking these forums for a while on a search for the perfect bike for me.

I bought a 2007 trek 1500 discovery channel team edition with 105 9 speed all around (paid $850 if your wondering), look pedals (some italian brand, I forget the name) and some snazzy specialized comp road shoes and of course the discovery team jersey and shorts (should I say defunct?)

When I bought the bike, the LBS explained to me how to shift up and down through the gears. I got a proper fit that feels great, and the owner of the business went outside and ran around while I road the bike to make sure I looked good on the bike as far as fit goes and really took his time to get me used to the cleats. I was an informed customer, and I think that had a lot with the service and treatment I got from the shop and that was thanks to this forum... THANK YOU ALL!!!!

OK, here is my question.....
When shifting, the gears change crystal clear, but today on a ride I realized that the right shifter can actually keep clicking past the point that I usually push when going down a gear. These are the type of shifters with the brake integrated. When I kept pushing the shifter I go down multiple gears which is nice when you find yourself going up hill and didn't realize it I suppose, but I had no idea it did that!

What exactly are the 105 shifters supposed to do when I click them all the way back? Is this normal? I feel like I don't know all the features of my shifters now.... Is there an instruction manual for these things? I know it seems like a chimp can do it, but I just like to do things the correct way.

Thanks again!