Chemlak wrote:
1) No.
2) No.
3) Not applicable.
Magic items do not have to duplicate the effects of the spells used to create them.
To elaborate a bit more: the limiting factor on magic items is cost. The caster level is used to determine how hard it is to dispel effects, and determine the DC to craft the item. Weapons and some other items have an extra craft requirement which includes caster level, but that can be overcome with a simple +5 to the craft DC, and any item crafter is going to boost Spellcraft to the levels where it becomes trivial to craft what they want.
Thus, the limit on obtaining items "before time" is character wealth. It doesn't matter how high your Spellcraft skill bonus is, if you don't have the gold to craft a +6 belt, it's not going to get crafted.
So while you are correct that items are expected to be limited to prevent bonuses (damage, ability scores, whatever) from getting too high too soon, the metric is not character level, directly. It is character wealth. Character wealth is, itself, expected to grow at a rate based upon character level, but because wealth is easier to fine-tune than level, it is something a GM has more control over, to help prevent abuses.
You are correct. So says AM DEVELOPER.