I made a fritatta this morning - the recipe said to bake it in the
upper third of the oven, so I moved a rack up. I left the pizza stone
on the rack below ( in mid-oven.) Would this affect the baking time?
Should I have removed the stone or just put the fritatta on the stone
and hang the recipe instructions? It seemed to take a long time for
the fritatta to be 'done' and screwed up the timing of the other
breakfast items. I think maybe the stone blocked the heat from the
bottom coil?
Another thing: should I have increased the oven temp because of the
stone's presence?

Maybe next time, I'll just do it stove-top in a big skillet, but I had
the other burners doing other things.