I have done that to...it depends how bad it is.
Try bandaging it to it feels comfortable although don't just bandage the sore are because then it will become uncomfortable seeing as the foot level is uneven so lightly bandage the other parts of the foot but none that reduce movement.
If you have an ankle brace use that or if its not enough bandage over the ankle brace.
As for the moveability don't tape the heel, this will leave room for movement...tape a triangle with the base at the heel but don't bandage the heel...bandage around it.
Bandage like the shape of the ankle brace below...but for more moveability allow more heel space.
Thermoskin Ankle Support