[VU+ Duo2] Timer troubles

[Tangfolio]

I just tried to set a timer zap for 10 PM tonight, Thursday March 5, and the box came up with a timer conflict but I see no conflict at all - all the conflicts it shows are for Tuesday March 10. I also tried changing the zap to a record but the conflicts still came up and even if they were on the same day there are two spare tuners available for the time in question. So I'm mystified.