Do not use the word zone as part of the zone name as this (or whatever you call your zones) is automatically applied throughout the system.
> In Zone A, Main Street (1 to 20) and in Zone B, Main Street (21 to 50)
> In Zone Two, Main street (Zone One) and in Zone Two (Main Sterrt (Zone Two))
> In fact, anything that ensures the uniqueness of the street name is sufficient but bear in mind your members would need to understand the distinction as well.
There are also 10 new zones that you will create based on the values in the spread sheet. Although all the new zones to be created are valid, in this instance, the first zone is "??". This is (hopefully) a mistake and should be rectified before clicking the Import Streets button.