The next issue you're likely to run into is that you'll finish a future rating, the controller will say, "pass for the CAT-4" (for example), then you'll log off, come back to do the CAT5 and find that the CAT-4 wasn't actually submitted. We get a few of these per week. Then answer can be found by the Taking the Tests page which is linked from the top of the ratings pages: https://pilotedge.net/pages/taking-the-tests
The last bullet point in that list is really, really important, but a lot of pilots miss it.