Seeker skill issue's

Feone - Dreamweaver

TT90 gold sacrificial assault blade:

the magic attacks don't zerk, is this a bug or is this intended?

Dual blades/swords:

The eye of the northern sky & other 2 similar "combo debuffs" don't work correctly, from what i can tell only certain attacks (the magical ones which dont seem to use the weps themselves) apply the status effects, and the skills to combo with them will not do anything special. (as in the spirit bore effect applied by soulsever minuet will not tick if a seeker uses gemini slash with dual blades equipped). Again the same question, is this a bug or is this intended?
Since these are pretty big factors in considering endgame weapons i'd like to know if i should expect these things to change or stay the same.