The first chorus doesn't have that second part, and the choruses near the end of the song are slightly different (although I haven't lookt into the specifics yet).
I also re-learned the synth parts that I recorded last October, and I'm not very confident that what I had was correct. I played only single notes for one of the parts, and now I'm pretty sure that there are at least pairs of notes, so I didn't include those this time.