Can't See all My Private Filters in "Issues>Manage Filters" Page

I'm a newbie with JIRA so apologize if I'm just not understanding something.

I created two private filters a couple of months ago and two new filters today. I want to delete the two private filters I created a couple of months ago. I can see the private filters I want to delete in the "Issues" menu, FILTER list, however when I click on the "Issues" menu, Manage filters option, the two private filters I want to delete are not listed. Only the two new filters I created today (and want to keep) are listed. I'm confused by this behavior.

Thanks in advance