I noticed this issue when you search for members with USA state locations. Let's look at the creators network as an example. If I want to find members that are within Alabama I would type in Alabama as the query and this is what I get. http://creators.ning.com/profiles/members/search?name=&country=... this query results in 8 members at the moment.
If I look for members using the abbreviation AL this is what I get http://creators.ning.com/profiles/members/search?name=&country=... this query results in 67 members.
I suspect if there are other countries that use abbreviations for their states or provinces this is contributing to a diminished result for members looking to connect across all networks and not just the ones based in the USA.
If you have found similar issues please report them here so Ning can fix this.