It isn't necessarily a contradiction. First, the 20E introduced the "Universal Wing" which allowed a wide variety of ordinance, and secondly the 30-RA onward is quoted for having HVAR racks for 10 rockets, not the 6 employed by the 25.
I like this site, but don't consider it to be the definitive information source. I bet if you dig a little you will find evidence that the -25 could carry rockets.