I've never had ankle issues while trail running (including off-trail bushwhacking during AR's) while wearing Salomon shoes.
I'm on my 3rd or 4th pair now. There's a reason that many of the top AR teams wear these.
As for your ankle, I'd suggest seeing an A.R.T. practitioner, asap.
(A.R.T. = Active Release Therapy, do a google search to find a local practitioner)
I badly rolled my ankle last summer just 6 weeks before my A race, and was able to recuperate enough w/ the (very painful, but effective) help of A.R.T. treatments to be able to complete the race.
In the meantime, lots of RICE (Rest, Ice, Complaining
, Elevation) will do wonders.