I have removed and verified the wiring and tab removal on all receptacles with no problems found. Somewhere the red hot (switched) conductor and the black hot (un-switched) conductor must be bonded.
This condition exists in two separate rooms with a third room (on the same circuit as the problem two) functioning properly. Both terminals on the switches test hot to ground regardless of switch position.
I can't think of other places to look.
Any advice would be greatly appreciated.