Them GlobalBounds are wrong !

[Falke88]

Wow in this whole process of making this understandable for you in a test class I managed to resolve the problem by myself

The problem was: GetGlobalBounds will give back the coords of the next higher instance the sprite belongs to. In my case sprite is within a Player or Enemy object. These object actually move but the Sprite within the object range isn't moving.

Thanks for your patience anyway guys! finally I can move along coding !

[Laurent]

Wow in this whole process of making this understandable for you in a test class I managed to resolve the problem by myself

Now you understand why we insist so much on the complete & minimal code
Things become so clear once you've removed all the unnecessary code.