You can only prepare so many spells, those spells can be cast at either 1st or 2nd etc. but you can only prepare that certain amount of spells. Some spells are only 2nd level, some are multiple levels, etc etc. so if you select a spell that can be cast at different levels it will make the icon available from each level for that spell, which you can add to your hotbar to cast at that level. The parts you highlighted aren't slots to prepare spells, they are how many casts you have left of that level. hope that helps.
Last edited by DrHaze; 13/10/20 01:02 AM.