To reset the zoom / pan of a painting to default, tap with two fingers on the screen. That should give you the default location and zoom. The orientation of the image likely relates to the orientation of the iPad when it was initially created. If you go into the gallery after saving your painting, you should be able to see the true orientation and you can rotate it from there.

I hope this helps but if you have any problems, please feel free to contact us directly at http://www.artrage.com/get-support/