well, there is like 3 ways to play an E7 and I know three ways to play an E9. It's just the fact that you have to do a little work to get the right sound. hey, I sound like a lazy guitar player! lol But no, when you add in all those variations and there's several chords going on it can take a minute to figure out. I get bored of that after a while and just make my own music... But it's cool to see all that great stuff on that site. Shake Revard said:
"wish it had some notes on if they should be barre chords, etc.
seems you have to toy with them..."
yeah, sometimes an "e" isn't a normal first position chord (i guess that's correct terminology) or barre chord. it might be some weird variation like an E7 or E9.
Good luck!