Fun trivia: the IT band kind of melds into the compartments of the calf and the achilles tendon. If you can relieve your hip pain by stretching your calf, it really does make sense!
DreadPirateRoberts - I would look at your feet if I were doing your PT, too. My first thought would be to check the heel cup of the orthotics or insoles you were using. It might help you to have a deep and sturdy heel cup like on Superfeet Green insoles or Spectrum Stabilizer insoles. (or Birkenstocks). Sometimes if the heel is unstable it leads to achilles/calf issues (which could yank on your entire IT band.)
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson