I found this when trying to show Hossein how it worked. It seems it was introduced in 1.7.5, as I've verified that the bug is present in 188.8.131.52 and 1.7.6-SNAPSHOT, but it works properly in 184.108.40.206. To recreate:
- Find a project with 1 or more MR Sessions.
- In the project's data listings, load the default "MR Sessions" tab if not already displayed.
- Click the "Age" column, then click "Hide Column"
- Click Options > Save Search, leave the values alone, and save the search.
- Refresh the page.
In 220.127.116.11, this would result in the project having still 1 searched called "MR Sessions", but with the modified columns. In recent versions of XNAT, it just creates a second search with the same name.