I'm having the same issue, again. Couple weeks back I had this same issue, the site 'accepts' my store infos, but it just routes me back to the same page as that link takes you to. Incorrect info on the other hand gives you the incorrect info message and you remain on the login page. It is a bug.
On a whim before I gave up, I changed my password in the store's 'account details' section, and... it worked.
But here we are again, a couple weeks later. pw change didn't work this time around.
What would be nice is an option in the games menu that just opened the reporting site with you logged in the same as the store does...