2D collision resolution troubles - collision

Question

So I'm working on a collision system based off: this blog,
although with some minor changes, as I had some issues with that code, and its working pretty good for all cases, except coming up from below,
here are some screenshots(green is before resolution, red is after): and here is the problem:
this is my code (sorry its messy and unoptimized, I was planning to rewrite it once I understood the algorithm):
public function ResolveCollision(a : CollisionComponent, b : CollisionComponent)
{
var aAABB = new AABB(new Point(a.GetBounds().x, a.GetBounds().y),
new Point(a.GetBounds().x + a.GetBounds().width,
a.GetBounds().y + a.GetBounds().height));
var bAABB = new AABB(new Point(b.GetBounds().x, b.GetBounds().y),
new Point(b.GetBounds().x + b.GetBounds().width,
a.GetBounds().y + a.GetBounds().height));
var direction : Point = new Point();
direction.x = aAABB.topLeft.x - bAABB.topLeft.x;
direction.y = aAABB.topLeft.y - bAABB.topLeft.y;
var end : AABB = new AABB();
end.bottomRight.x = Math.min(aAABB.bottomRight.x, bAABB.bottomRight.x);
end.bottomRight.y = Math.min(aAABB.bottomRight.y, bAABB.bottomRight.y);
end.topLeft.x = Math.max(aAABB.topLeft.x, bAABB.topLeft.x);
end.topLeft.y = Math.max(aAABB.topLeft.y, bAABB.topLeft.y);
var overlap : Point = new Point();
overlap.x = end.bottomRight.x - end.topLeft.x;
overlap.y = end.bottomRight.y - end.topLeft.y;
var moveAxis : Int; //0:x, 1:y
if (overlap.x < overlap.y)
{
moveAxis = 0;
}
else
{
moveAxis = 1;
}
if (moveAxis == 0)
{
a.Move(new Point(sign(direction.x) * overlap.x, 0));
}
else if (moveAxis == 1)
{
a.Move(new Point(0, sign(direction.y) * overlap.y));
}
}
private function sign(i : Float) : Int
{
if (i < 0)
{
return -1;
}
else if ( i > 0)
{
return 1;
}
else
{
return 0;
}
}
if anyone could point me to the problem, that would be great, if not, I feel like I understand it well enough to write it in a simpler way, and possibly figure out the cause...
thanks,
Nico

Answer 1

oops it was a dumb mistake in the AABB creation (where of course I didn't check), I was initializing some of the "b" boxes properties to those of the "a" box:
var bAABB = new AABB(new Point(b.GetBounds().x, b.GetBounds().y),
new Point(b.GetBounds().x + b.GetBounds().width,
**a.GetBounds()**.y + **a.GetBounds()**.height));