its starting bug me, using the hotkeys (d-pad) for slots 2,4,6 and 8 is to say the least.. a problem, its the pads fault the direction buttons just arent designed well enough to allow you easily select them...
but for a future games i have a solution
you could map spells using a tap or double tap (UP, DOWN, LEFT AND RIGHT on the dpad)
ie
tap left for heal light wounds, double tap left for flashbolt or whatever
does anyone else have this problem on console pads?