The problem with quests (Divinity: Original Sin 2)

The trick is that before he reached the town on the way picked up quests
There save the elf to kill the crocodile, etc.
The problem is that all over the map now quest flags and I really find out they can't, well, I saved the elf came back to the cave in the task says talk to the woman who gave the quest (don't remember the name) say and there is just the end. I'm kind of quest did but he's not finished
With this collar the same problem, went to the blacksmith began the quest dialog appeared that it supposedly can be removed and this man knows how, I told her she said I'm not going to remove all the flag on it that she can remove and dialogue trade and end and what to do hell knows.
And so many quests