Once I tried to make a pot for baking or steaming a bread that you could cut round slices from.

1. I threw a cylinder with a flat bottom radiating from it.
2. I cut it in half verically.
3. I connected what had been the tops together with scores and slip.
4. I cut away the sides that were not necessary for the feet that held it up.

It looked like it would work, The dry greenware sat flat on a table.
The bisque firing twisted it a tiny bit, but I sanded or added so that it was able to again sit flat on a table.
But alas!
After the glaze firing, the feet were rotated and the whole thing twisted so that it could not stand flat.
I threw it out.

Some rotation definitely occurred during the firing.