Why skip level 78 spells?

Ok, so, if you, like me, have looked at your school's learnable spell list (You can look this up at wizard101 central) and noticed that when you look at the levels, they look like this: (Note that this is for myth school) Dimension Shift// Trade all hanging affects with minion// level 75// Celestial Calendar// Deal 1070-1170 and steal one pip// level 88 Ok, notice the gap there? There is no level 78 spell. Why Kingsisle did this, the world may never know. They do this with all the schools, not just myth. This has been a reaccuring theme with them to have a spell at any level with an eight at the end. (level 8- myth trap, level 18-cyclops minion, level 28-stun, level 38- minotaur minion, level 48- orthrus, level 58- medusa, level 68- basilisk, level 88- celestial calendar.) I truly have no idea why Kingsisle would have done this. There is also a serious gap in between the level 75 and the level 88 spells. Could they suddenly not come up with any more spell ideas? They should put a spell around level 83, or, here's an idea, level 78 spells! *Gasps* That's never been thoght of! Besides, some schools could really use that extra boost in there belt. Take balance for example. A good amount of their spells are for boosting others. They need a few more solid attacks in my oppinion. They do have quite a few more tactical advantages than soem of the other schools. A lot of schools should have a spell in that gap that should fill in some weak spots in each particular school.