Column order in the Listing Grid is saved at the store level, not separately for each individual user. This means that if another team member changes the column order in the same store, that shared layout can also affect what you see. For teams, this can make columns such as product title, tag size, or true size look like they are moving around on their own, so it is best to agree on one shared column layout for the store.
Why do my Listing Grid columns move around?
Understand why column order can change in stores with multiple team members.