Bonus craft / Effective merge

Hello,

I was a bit surprised by two crafting skills, and their values at the same level (for the same price).

One (bonus craft) gives "1% chance to craft 1 more item" per level. If you merge lvl 1 items, you get an extra lvl 2. That is 2 lvl1 items given for free.
The other (effective merge) gives "0,5% chance to use only 1 item" per level. If you merge lvl 1 items, you get an extra lvl 1. That is 1 lvl 1 item given for free.

With the % per skill level as it is, one is basically 4 times stronger than the other one. For the same price. If the % per skill level was the other way around, they would be balanced.

Anyone knows of a typo on these ?