Unfortunately there isn't a way to completely avoid the same city when spinning titles.

Spintax is completely random so there will always be the chance that a city is chosen more than once.

However, we do recommend that when you spin the title, you spin for more cities than accounts you have.

As an example, if you spin for 30 different cities and you only have 20 different accounts, this will reduce the number of duplicates you will receive.