Pro Member - only one compendium sharing slot

As above. And only 5 players being shared with. Just does not allow me to open a second sharing slot, I get a red circle with a cross though it when I hover over any of the remaining slots. Anyone know what I'm doing wrong or is this a known bug? Thanks in advance!

That is intended. You share the compendium in the current game, via the settings of that game. The only reason the five slots are shown is to enable you to free up a slot by stopping to share the compendium in another game.

Thanks for replying Martijn, but that screenshot is actually taken from the settings of a second game. So it's saying I've used 4 of 15 (from Last of the Lost Legion), but won't let me open up any slots for the actual game the settings belong to. As I understand it, as a pro member I should be able to share my compendiums in 5 games. As it stands, to share in this second game I need to remove the sharing in the first game.... unless of course I'm totally misunderstanding you.