There are three "spells" that you getting confused with.
Telekinesis - The ability of magically grabbing items (potions, weapons, barrels) and moving them around. This is done outside of combat and is a passive ability. I find having one or two items granting you this ability is just fine.
Air spells
Teleportation - The spell to make an object or NPC disappear and reappear high in the air and fall onto the ground. Has a greater distance then telekinesis and can be used during combat or outside of combat. CAUSES damage or destruction to NPCs and Items. Cannot be used on items like weapon on the ground or healing potions.
Light as a Feather - Same as teleportation, but causes no damage or destruction.
