The mask that you received is the IX3-UMP mask - Diamond only makes the two below that you ordered and received (the IX3 and Big League mask).
The one picture you gave me is the older model of the IX3, even though the lettering says DFM-UMP, and you did receive the correct mask.
This year's model has changed a little, and the lettering on the mask now reads IX3-UMP.
If you have any further questions/concerns, please feel free to contact me.