Does the command undead feat work off class level or character level? The description of the feat says, " You can control any number of undead, so long as their total Hit Dice do not exceed your cleric level." However, when a Wizard gets this feat through the Necromancy domain it says,
"You receive Command Undead or Turn Undead as a bonus feat. You can channel energy a number of times per day equal to 3 + your Intelligence modifier, but only to use the selected feat. You can take other feats to add to this ability, such as Extra Channel and Improved Channel, but not feats that alter this ability, such as Elemental Channel and Alignment Channel. The DC to save against these feats is equal to 10 + 1/2 your wizard level + your Charisma modifier. At 20th level, undead cannot add their channel resistance to the save against this ability."
Notice it doesn't say anything about being able to control a number of undead equal to your Wizard level. But it must be changed, otherwise, unless you are a cleric\wizard you wouldn't be able to control any HD of undead because you don't have any cleric levels.