Improve the Class Filters - they don't always work

When you are on the classes page I find the filters do not always work, so it can make it hard to search by domain as that is not one of the display columns.

I find that I often have to only use the search function on the right-hand side or I have to use this as well as a filter.

We have a lot of domains and being able to search properly with this function would be great.

It would be really good if the filters can be looked at because they do not seem to work consistently.