yeah, i have found a few major errors here and there, inlcuding the one you mention. i think i reported one of them (in that little window that they have for comments). overall i think Rx is a good product, but those errors really throw you over the edge if you get them on a bad day . . .
try to blow it off, knowing that you now know the proper information probably better than you would otherwise. nothing more effective than spiteful studying . . .