Holsters styles didn't work

[Delfar]

I have bought the melee weapon holster styles to customize my warframes, but I have tried some and they fail. E.g. I have a zaw katana and I changed the holster to right shoulder one but as soon as it can it change it to the standard to the hip holster and fight with the holster in the left hand (I don't know if this is part of the Blind Justice mod) but when I start a mission then suddenly the warframe change the holster to standard. I feel my plat was wasted.