DP doesn't necessarily need to include Anal! (if you think about it)
Oral and Vaginal at the same time could be classed as DP (going by the AW likes list) as could inserting two items vaginally (eg a cock and a toy)
I think you're stretching a point there ( no pun unintended!)
DP is the common term for vaginal and anal simultaneously.
DVP is the term for any form of double vaginal penetration.
Oral and vaginal simultaneously would generally be referred to as spit-roasting, although I doubt there's an AW 'likes' category for that.