well i tore my MCL and meniscus about a year ago.
My ankle got huge and purple for a week aswell.
had mensicus surgery they sewed it back on. left my MCL alone. grade 2/3 tear.
i notice my tib fib on that side is definitely twisted inwards more than the other.
http://www.iphoneogram.com/p/523412214578725727_27621071/
This problem happens with both legs, but is worse on my torn knee.
strecthing has helped alot but it still snaps.
if i work out too hard, i get a painful stinging sensation on the inside of my knee that lasts for weeks. happens randomly.