Moderator's note: AOL has been powered by Bing since 2015 and The Open Directory Project was shut down in 2017. Most of the rest of this answer is out of date.
According to About AOL Search:
These listings are administered, sorted and maintained by Google. ...
For information on how Google sorts these listings, go to About Google.
AOL is likely a bit behind Google in listing these, so you should probably just give a few days extra to catch up.
Note that https://help.aol.com/articles/aol-search-faqs gives slightly different information under "How do I add websites to AOL Search?"
AOL Search is a hierarchical Web directory, organized by subject. All
user-submitted Web content is maintained by the Open Directory Project
(http://www.dmoz.org). The Open Directory Project is run by a staff of
volunteer editors who evaluate and classify websites in one or more
categories and exercise the option of choosing to add a site, moving
sites between categories and creating new sites.
If you would like to submit a site to the Open Directory Project,
please go to http://www.dmoz.org/, click suggest URL and follow the
steps for submitting a site.The Open Directory volunteers are quite
passionate about their work and your site will be evaluated quickly.
If your site has been accepted into the Open Directory, it may take
anywhere from two weeks to several months for your site to be listed
on partner sites which use the Open Directory data, such as AOL
Search, Google, Netscape Search, etc.