DPS calculation seems incorrect

Hello there,

I have a new Mage and the DPS for the spells seems to be wrong.
Using three different wands, the one that gives the most DPS on all my spell is the one with the less Spell Damage and less Increased Elemental Dmg.

I recorded a video showing two of the wands.

Hopefully this is something I’m missing but it really seems like either my wands have issues or the DPS calculation of spells is wrong.