You're thinking too hard about it. It's syncopated. It's pretty much four beats per chord but every other chord starts "early" for lack of a better term. Just start counting 1-2-3-4 from the first note (two notes per beat of course). You'll feel it before you know it. Some call it "off beat" and some simply say "coming in on the and of the previous beat".
The first song that jumped into my head as another example (or what you're talking about and my age) is Jealous Again by the Black Crows. Syncopation all the way through. Just count to four or tap your foot while listening to the whole song. You'll find that nearly half the chords are syncopated.
This whole song is littered with it. Some notes come in "early" (on the "and" of the previous beat). https://www.youtube.com/watch?v=Jjq5Rq4sSZc
Although the style of music is very different, the concept is the same. Syncopation is found in many pieces. In some cases it presents itself more obviously than others.
For once, Wiki actually does a pretty good job of explaining this (assuming you have some musical background). http://en.wikipedia.org/wiki/Syncopation
I guess my best advice would be to try counting notes less and just "feel" the bass line in the context of the drum beat.
Hope that helps.