That's odd. I know it's close but it doesn't hit with mine. What base do you have? That's a Badger above and it works fine. You will need the 1" height then which is what I run with my 5-25s.tyy
Seekins low work with some set ups but not others. It is REALLY close...so close that those that do not fit may have fallen victim to tolerance stacking.
I have the same issue. My Near alpha mount I've been using for my 5-25 will not work with my 3-20. It needs just a bit more clearance for the turret housing.