In average the cilours only move when I tilt the canvas unless a lot of paint drips over thevsides. It's important to wioe that away (about 2-3 times wipe underneath) since the dripping paint pulls what is on the canvas to the sides.

With me most is dry within a few hours or next day. I paint in the kitchen, next mive it to the living, and next day it goesinto the basement to make room for something else and can continue drying if needed (it also depends on the temperature with you and how thick the layer with paint is).