Andreas C

We have 3 computers linked with the same Dropbox account and have a sync issue with quotes. We edit an existing quote and make changes and then the next day or the day after it all reverts back and the changes are gone like we never edited the quote. It just seems that the 2 PCs are not downloading the data from the main PC and are instead overwriting it with older versions of recently edited quotations. How can this be fixed?