I've seen that as far as Uncanny Avengers has go, Havok and Wasp seem to still be possessed by their alternate future counterparts (so I guess does Thor, Wolverine, and Sunfire). Considering that they travelled back in time similarly to Kitty Pryde in DOFP, shouldn't they already have been depossessed when they succeeded in stopping Exitar? Or Kang did something so even though they're no longer possessed by their counterparts they remember their counterpart's experience?
Similar is not the same.
The Uncanny Avengers who lived through that storyline are going to remember and be affected by those experiences.