How to stop autofill of CAT2 and unloading points

I am having trouble getting rid of autofill boxes. When I login, I go in to cat2 and have an old personnel number in there. I have tried deleting all my local data/histroy but it still is autofilled when I log back in.

I am wondering if the reason why I can't get rid of these autofill boxes is because we can log onto any computer and have the data there, so deleting it off my local PC wouldn't delete the data on the server.