Also since the game this it's "Behind" the wing it will act like and elevator this when it points down it makes the plane go down

The Flap is behind the mind wing, and SO perceived that as an elevator and thus makes it act like one....... you need to move the flap forward so that it's not behind the main wing..... I may be wrong but from experiments I've done before..... that is most likely the problem

we know what is wrong with it, we may suggest you to move the main wings a bit more to the front, if the problem persist, reduce the length of the main wing, if yet the problem is still there, repeat the step again

here is my plane with ELEVONS

Maybe the wings aren’t forward enough for the flaps to profile evtra lift the normal way. @ColonelStriker

It... is hard to describe. I recommend downloading it. Basically the direction the control surfaces I made is inverted @Delphinos
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Like the flaps. It’s supposed to provide extra lift right by pushing a surface down. Thus the nose rises. But in this case, when the flap goes down, the nose goes down.

What kind of problem is it? Sorry that we do not get it clear

@ThePrototype