1.是2.是3.不知道，我认为是1级1结算

职业发出来，看具体描述

我个人觉得是这样。
第二个问题是要么法师/牧师各获得一个5环，要么其中一个职业获得一个5一个0-4，另一个啥都不得，没法5环给法师，0-4给牧师吧。
第三个问题应该是指你这一级选定好给哪个职业几环法术就固定了，不能再改（除非重训），没说以后都必须选第一级选的职业。类似 额外法术位专长 ，几级选定的几环就是几环，不会自动涨。
就是不加scl吧，看他举的例子：
10级牧师/9级法师，获得奖励法术是各5或其中一个职业5和0-4，如果加scl的话牧师不该是11级最高6环吗？
For example, Unthor is a 10th-level cleric/ 9th-level wizard, with one level of mystic.
Conceivably, Unthor could have a bonus 5th-level wizard spell and a bonus 5th-level cleric spell, or you could put both spells in either cleric or wizard, but only one of them could be 5th level.

职业能力原文，可能有错字母，凑合看吧
Bonus Spells:
Similar to bonus spells for high ability scores, for each level of mystic that a spellcasting character attains, she gains bonus spells to the number of spells per day she normally casts.
These bonus spells can be added to whatever levels of spells the caster can currently cast, but no more than one can be added to the caster's highest current spell level.
Example: Mialee is a 9th-level wizard who takes one level in mystic.
She can give herself one bonus 5th-level spell (her highest as a 9th-level wizard), and one bonus spell in one other level, zero through fourth.
If a mystic has two spellcasting classes already, he must choose which previous class of spells gains the bonus.
For example, Unthor is a 10th-level cleric/ 9th-level wizard, with one level of mystic.
Conceivably, Unthor could have a bonus 5th-level wizard spell and a bonus 5th-level cleric spell, or you could put both spells in either cleric or wizard, but only one of them could be 5th level.
Once a mystic has chosen how to apply his bonus spells, they cannot be shifted again.