In the default Blizzard unit frames you get an icon below the player frame for each totem. Whenever you right click a totem icon the corresponding totem gets destroyed. This feature seems to be missing in the totem bar of LunaUnitFrames. As a workaround I have the default player frame visible.

I also noticed that the timer bars for the totems in LunaUnitFrames do not disappear whenever I right click a totem icon in the default Blizzard player frame.

I will not be adding the functionality to destroy individual totems as it serves next to no practical purpose (Totemic recall is used most of the time). And adding this is a major headache/ impossible in a way that would fit into the dynamic bar system that Luna uses.
The timer bug will be fixed in the coming update.

Fixed timers in v4140.