Character level requirement for crafted/enhanced items

How is the user level requirement for crafted items calculated?

I'm not complaining, but there may be a bug in there.

It seems one must be Level 44 to wield a +6 weapon.
At about Level 45, my char put a garnet onto a +6 Longsword.
I was thinking that the new char level requirement for that weapon would be 44, or maybe 45 (taking the crafter's level). However, the requirement for my new Flaming Longsword +6 was 40

i was thinking the same thing. and another thing i have notice if u pay to upgrade yer wpn u can use it a few lvl b4 u could use one of the same enchantment bonus which was bought or found.

I allow people to carry a little better weapon if they pay to upgrade it. After all, they are paying for the privilege.