Darren, occasionally there is mention at the top of the arrangement that the guitar has a capo on it. This is a device that clamps on the neck and raises all the string tones a uniform amount. We use it when we want to play certain chord shapes but change the key. I have seen arrangements that show the chord shapes, with the chord sound due to raising the tones in the paretheses. You might have that, as well.

All the best,

Mick