Not all of my products are synchronised; cron job stops

Variations are treated as individual products by the cron job, so the real number of products that have to be synchronised is shown in the Synchronization log.

With this being said, please read here how the cron mechanism works and how the number of products synchronised is calculated.

We are planning on modifying how products are synchronised in the future, in order to make it more user-friendly.