cowitness and lower 1/3 co witness

[Hackman]

I have a sight mark red dot and flip up iron sights and the iron sights seem to line up perfectly with the red dot at the top of the front sight. I want to get a vortex strikefire which advertises lower 1/3 cowitness. My sight mark mount looks to be even taller than the vortex mount so how does that work? Wouldn't the shorter vortex mount make the irons go in the upper 1/3 of the optic. I'm like wtf. Here's the current setup