Hello. This sounds like a similar problem to this: http://forum.avsim.net/topic/418404-pmdg-777-ezdok/
I've tried both ezdok and opus cameras, but they both have the same issue. I'm not saying the problem is with that software, as it is apparently an fsx problem that can't really be fixed. I do find it incredibly annoying.
It might be worth noting, though, that I've only noticed the problem since my Track IR unit broke, so perhaps the Track IR centring pops the view back to the initial position. I can't confirm this until I get my replacement Track IR system, though, sorry.
Tim