Further reply from Logitech Support today.

The number buttons now work for continued skips if the same button is pressed repeatedly.

There are still problems with the Power Topggle, Exit and Green button which do not respond with repeated use use. And there is an unecessary delay switching between activities (say Solo 2 to Duo 2). But obviously the logitech technicians know what they are doing and are clever enough to fix these remaining quirks.

The remaining frustration is with VIX on the Solo2. For some obscure reason it will only display 24 hours of EPG, not 7 days as with the Duo. I asked for help elsewhere, had one kind reply, but we never did find a solution. This morning I did a complete new installation, scans and all, but I ended up with the same result. Why the Solo2 should be different to the Duo 2 when each have the same EPG plug in and same settings beats me.