Can't link Twitch account

SDS

Likely been asked before...but why can't I link my twitch account? It leads me back to the log in, where apparently my only option is to use my PSN credentials(My The Show account credentials apparently dont work), and when I get in, it tells me it's already linked? But twitch keeps prompting me to link it...what gives?

SDS

Make sure you use the email address for your show.com account, not the one for your twitch account if it happens to be different.