Trackpad not flush with the keyboard surface
The Trackpad of my MacBook 13" Late 2009 Model A1342 was slightly up in the left side, so I decided to open it to check what was happening inside, following the instructions in your site. When I took out the battery pack I figured out that it is seated over the battery body. Then I could do nothing, because when I replaced the battery the trackpad still remained slightly up. Is there a way to fix this? The only explanation for this is that the battery is slightly up, or, I don't know... it has grown slightly in volume?!?
Some idea how to fix it?
Another question is that, when I was doing this procedure I found two black Phillips screws loose inside the MacBook, and I cannot figure out from where they are, because it's the first time this MacBook is opened, and all the screws I took out in this procedure are back in their places, and those two loosened screws are about 9mm to 10mm high.
Update (03/18/2016)
The screws are 9mm to 10mm high, and not 100mm.