Couple DB + crit ring mechanics questions

I thought Triple Stab was 2 dagger 1 blade regardless?

I mean the mirror image hits. they look like they are 2 blade 1 dagger, because the one in the middle is stronger. the part of my attacks is always 2 dagger 1 blade.

it's as if the dagger/blade is determined by a mod 2 of the attack number; and since triple stab is odd numbered, the MI hits are reversed on the weapon.