I don't think that's quite what is desired. It will limit the suggestions for completing months that are missing to the selected type, but it won't actually help you to fill your matrix completely with one type.
I have filled my matrix as far as possible in Sweden so if I just run the tool with no type selected I get no suggestions (which is correct). If I select to find just traditionals I still get no suggestions. That *could* be correct, but I doubt it. However, if I select earthcaches instead I still get no suggestions. That would mean that I have logged all months available in Sweden, and that's not even possible since earthcaches weren't available from the start.
The type filter here is the same as the cache type filter on the D/T page. What is desired is the D/T cache type filter on the D/T page.