Criteria checkbox.contains() changes field value in view
If a checkbox field contains multiple selections, for example "AAA,BBB,CCC", and a view is created with criteria Checkbox.contains("BBB") , then the value listed for the checkbox field in the view will always be "BBB". It should obviously be "AAA,BBB,CCC" (or whatever combination of checkboxes are selected).
An auto-filter on the checkbox field does the same thing, for example if you select "CCC" from the filter drop-down then fields containing "CCC" and other values will be listed as "CCC".
Also the criteria specified is !Checkbox.contains("BBB"), rows that do not have any checkboxes selected will not be shown.