The issue I have....

If I program in 3 simplex channels,

the 1st one is VHF, The other two are UHF.

I can receive on the VHF channel both when it is primary and when it is secondary, regardless of being left or right.

With the UHF channels, I can only receive either UHF frequency on the secondary when the primary is also on a UHF frequency or channel, doesn't matter which way for left and right.