When we use horizontal button filter we have to click again on a filter to deactivate it if we want to apply only an other. It will be easier to have an option wich will deactivate filter automatically when we choose an other.
Eg. if I click on Filter Two when Filter One is activated, both will be activates with AND/OR condition. If I would like to have only Filter Two, I have to click again on Filter One to deactivate it.