Hi, Christina Calkins!
The worksheet "says" that the data is sorted by ST (F), City (E), ST (C), City (B), you could check it easly removing and setting again the option My Data Has Headers, but I'm somehow reluctant to agree with this. Let me see.
Give a look at the uploaded file. I added 4 columns, G:H have the length of columns B:C cells contents and K:J those of E:F. Check this and edit manually any "strange" cell (F17) with F2, and you'll find that it has trailing spaces. Remove them and retry.
If you have a lot of data, you can write at any blank column:
=TRIM(B2)
same for C, E, F, then copy down as required, and then select by pairs of columns, and copy & paste values over the original cells.
Regards!