Sorry, I've been busy lately and had to drop a handful of PbP's (not this one, just fyi).
So, looking back Vita is running at me (forgive me but I don't know who that is...) and I ran into something invisible and the witch is flying around with a box correct (basically)?
Vita is Bjartr's raven familiar. It is trying to deliver a curative spell to you. It can fly at a speed of 40 ft, so it'll catch you eventually
The crone tanarukk is flying (she is still ~20 feet in the air again, and is in the bottom right corner of the map), and she is holding some sort of box. You did run into something invisible that caused you to stop short of your destination. You heard whatever that was chant something, and then everything got real quiet for a moment, but now you can hear sound again.
Yeah, telling Thane to seek or track or something will take a move action.