Yes, it cause problems!!!!
Perhaps even Psycho ones too , not just to the database.

You could use the & in Cinema world and in the More Title field of DVD world, but not in the Title field in the DVD world.

DVD Title:
Cowboys And Aliens.
Do this match to the Cinema world? Answer is No.
In Cinema world the Title is Cowboys & Aliens.

How come you could use the & In the Title Of Cinema world and in the More Title field in the DVD/ B-r world?

The way it is now, i'm sure it causing problems to each world and the database.

Please try to make some changes, cause this is just insane!
This could not be correct.

Thanx.