Angle print problems and bending in center

[plasticpolygon]

Hi veryone.

I have two issues with my Up Plus 2 printer.

First is that at a certain angle when I print outward from the bottom to the top it messes up the smoothness.
My Up Mini doesn't do that. (I will post pictures later). So when I print say ball with the bottom part being sliced, the
roundness on the bottom is really messy.
Is my printer just broken? Or do I need to adjust some setting?

Second is that if I print an object in the center, it bends upwards on a side. So everytime I print, I move the object to
the other side as far as I can. But that's not how it should work since I can only print 4x12 cm instead of 14x14 which it should.
The base is as hot anywhere so I don't think it has something to do with that.

I will post pictures, I hope somebody can help me with this. Hope it's not broken.

Thanks in advance,