I picked up a couple of books with some simple acoustic guitar songs. Each row/line has the standard note notation on top, the tab notation on bottom, and the lyrics in the middle. Hopefully thats pretty normal as its easy enough to read :)

One thing is confusing me though -- There are what looks to be chord names above the top of the standard notes section every so often (about once or twice a measure... depending on the song/section). There are even chord diagrams for all of these chords at the top of the first page in each song.

I thought these were the chord positions to use at first for that set of notes, but the tab notation doesn't match. IE the tab notation says play the A string at the 2nd fret but the note at the top would say F or D which means I would have no fingers on the A string at all???

I'm still very new to this and I suppose I could be reading something wrong but any info as to what those chord names are for would be greatly appreciated as I sure thought I had tab notation figured out at least...