I have the same issue with a small french town missing from the list.
I will select the closest one in the absence of another solution, but like you I feel a little insecure about this, because then I won't match my documents.
The more I read, the more lost I am about the income part of the application. Should I include invoices in my Visa application, or is the contract with my main client enough?
People that have provided a contract and proof of sufficient funds have been asked to show invoices and money transfers between them and their clients?