Is it possible to have caster levels stack? they appear to be untyped.
No. If you have 1 level of Cleric then your caster level it is 1 Cleric level. If you gain a level and take the Sorcerer class you now also have one caster level of Sorcerer.
Thus your character will be a level 2 character with a caster level of 1 Cleric and a caster level of 1 Sorcerer.
Caster Level
A spell's power often depends on its caster level, which for most spellcasting characters is equal to her class level in the class she's using to cast the spell.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.
Is it possible to have caster levels stack? they appear to be untyped.No.He's probably referring to items that boost caster level, such as the bead of karma from the strand of prayer beads and the orange ioun stone.
AFAICT since they are both untyped the answer is "yes", they stack.
The two of those would stack together, but multiples of the same item (even when the bonus is untyped) would not stack. Two beads of karma would not work together, nor would two orange ioun stones. Untyped bonuses stack as long as they are from different sources.
Is it possible to have caster levels stack? they appear to be untyped.No. If you have 1 level of Cleric then your caster level it is 1 Cleric level. If you gain a level and take the Sorcerer class you now also have one caster level of Sorcerer.
Unless you use of course.