I actually like the sword resolution. It reads to me like a stylistic choice, not a mistake.
Sometimes breaking the expected pixel-perfect look can make a sprite stand out more, and if you look at it visually, the contrast is pretty interesting.
Also, I’m sure they know about Aseprite. It’s a great tool, and honestly I think it’s worth buying if you do pixel art, but I don’t think every unusual resolution choice needs to be treated like an error.
Peace be with you, and keep making cool stuff.