Unincorporated land in Parker County, listing requires city

[Bruce Thornton]

Extreme newbie here so please, no laughing ;)

I have an unincorporated land listing for 7 acres in Parker County (#13550711, 219 Aledo Creeks Rd).  NTREIS requires a city, and for zip code 76126 I have to put in Fort Worth.  However, it's in Aledo ISD.  My questions are:

• How can other listings in the same subdivision have Aledo for the city? Are they adding the information directly into Realtor.com and Zillow.com?
• What other sites can anyone recommend for land listings?  I usually deal in houses.
• Are there tricks users have to do to find my listing?  It just doesn't seem to get many hits.  There are plenty of mentions of Aledo in my listing.