I have plenty of space here in my invo, but yet I'm getting alerts stating that I have no room in there! This is very frustrating to me because I can't complete any quests. D= On top of that, my avatar has been hexed like this for about 2 days. Is this a glitch?

Maybe you have a lot of things stacked that you didnt realise? for example i have a stack of 30 fresh pumpkins in my inventory and that counts towards the 100 items youre allowed to have

- I've found several of the older hexes hang around for a really long time. The best 'cure' is to ToT a lot and get newer hexes to cancel out the older ones.