YES to all
Blaspheming as a non-evil caster (or an alignment-changed good outsider) is a Bad Idea. Especially with the ubiquitous caster level buffs. It's a great way to YASD in Pathfinder.
Note that (other than 'dead') you do get off slightly better than most creatures, assuming you cast as you last action on a turn; your conditions end on your initiative count of the round they end, so, for example, if you daze yourself you stop being dazed just before your next turn and don't lose it, though you still can't take any more actions before then, still are vulnerable to special attacks requiring dazed targets till then, etc.
You can cast at a lower CL with any spell, if you'd like to, and you can choose to do so at the time of casting. If you have to do so to cast these spells, however, it's probably not a good idea to be casting them at all. The following rule applies:
You can cast a spell at a lower caster level than normal, but the caster level you choose must be high enough for you to cast the spell in question, and all level-dependent features must be based on the same caster level.