While sheathed, the LFR/Normal/Heroic/Mythic variations of Rashon, the Immortal Blaze are positioned with the curvature of the blade towards the character’s left, with the center of the handle anchored to the character’s back.
Verdant Gladiator’s Axestaff, which shares the same model, has a completely different position compared to the other four appearances. The weapon on the player’s back appears to be horizontally flipped so the curvature of the blade is towards the player’s right and the anchor to the player’s back is further up along the handle.
This results in the blade completely clipping through any shoulder piece the player is wearing, while also clipping into their right elbow with the bottom of the blade. It appears to be a significant oversight on consistency between these weapons that all share the same base model.
I’ve linked some in-game outfits that allow you to see how poorly the clipping is
The first outfit is the Druid Season 3 Elite set with the Verdant Gladiator’s Axestaff
/outfit v1 77344,190317,0,190329,190297,0,0,190325,190305,190321,190313,190301,190839,-1,0,0,0
The second is the Heroic Benevolent Embersage Tier Set Transmog with the Heroic version of Rashon, The Immortal Blaze
/outfit v1 77344,192485,0,192452,192540,0,0,192463,192518,192474,192496,192529,191099,-1,0,0,0
UPDATE: This clipping issue seems to be particularly notable on Night Elf Body 1 and Body 2. Night Elf Body 2 is incredibly broken with this weapon, as the blade cuts their ears in half and makes it look like the blade is stuck in the middle of the player’s head while running. All other races seem to have far less issues, aside from the weapon’s position not matching Rashon, the Immortal Blaze, looking like the weapon is going to simply slide off the player’s back.
Here is the Wowhead Dressing Room with the weapon and Night Elf Body 2 - Feel free to play with the animations to see how bad it gets.