I just spent 30k Requisition on 1 Relic supply drop and got a standard run of the mill Meltagun worth 400 Requisition.

Epic fail.

By any chance, were they identical upgrades for 2 separate classes, both which can use chainaxes?

Too expensive and too little ammo, for the same price you can carry a much better plasma pistol if you have the advancement.

Got one shot slugga.
1 shot 160 dmg 2.5 sec reload.

I didnt check, but that would be ridiculous.
If it is, it still doesent explain two Force Axes, since only 1 class can use those.

shoulda shown diz picture to convince me
no more 1k drops from 30k I hope!

I picked up a flaming Crozius Arcanum from a 5k box. I main Wolf Priest, so it's awesome. It sets the target on fire on hit. And I'm pretty sure it does extra fire damage because I swear I'm killing people a lot faster with it.

It definitely does, I know because I've been hit with it.

Picked up the MC reaper launcher (lower heat, you can get a 7th shot off after a full starswarm) nd MC witchblade (+20 warp charge) in the 12K boxes.

That...sounds amazing actually. Like, the perfect finisher weapon. Bust their armor, one shot, ded.

My assumption is going to be A: you got one for chainSWORD and one for chainAXE, if you were playing Chaos, or B: a bug, which needs some reporting on.