What do you mean by limited. Can you clarify. Are both boxes remotes and boxes set to the default of mode 1 (either remote should control the other box), or was one reset to a different mode so the remotes do not clash ? If both mode 1 does both remotes work the one box. Using the 0 + OK does the problem box report a mode change pop up stating current mode is 1. If so does changing it to another restore remote control ?