That site isn't completely awful, it does cover most of the basics and it does say that cory cats are under the list of what you can not keep. Can I keep other aquatic life with my ACF?
I think just reading on the phone may have made it hard to distinguish between both lists. But I have tried a few times over the years to join as a foster home/take on one of the frogs and I never get a response from the site owner.

Unfortunately it's a situation where the store lead you wrong and it's just one of the common learning curves that comes to keeping these frogs.