As the title shows that is a problem. One unit is used about 85% of the time so the other receiver that has one of those IR pickups that can be placed anywhere gets the other 15% of use. I fix the problem by moving that pickup out of sight or cover up the other receivers IR pickup. It works, but...... Would it be possible to go inside and change one of the units and the remote so they would not interfere with each other? Or would it take an electronics pro and equipment?