Well, in that case and as you already have said... the plot thickens

I have never been able to navigate with the time tracker if I cannot do it with the FF/Rewind buttons.

And I have never had to strip tracks to do anything, on the contrary, I sometimes add tracks, which I switch with the INFO/DISPLAY button.

I still think that Mezzmo just streams the file and the LG devices detect what can they do with them or not, and I suspect that there are differences on the MKV format support between devices.

Anyway, I'm glad that you can now navigate on your movies !