Hi,

Here is a reproduction of what looks like a bug to me:

1. http://localhost:8080/labkey/query/home/executeQuery.view?schemaName=core&query.queryName=Users
2. Click on email column header -> Filter...
3. Create dual filter with "Contains" the string "@" and "Is Not Blank"
4. Try to remove the "Is Not Blank" filter by click on the orange ''X' by the filter description in the grid header.

Result: Both filters are removed
Expected: Only Is Not Blank filter is removed and Contains @ filter is retained.

-Will