We have email and PM auto actions that are triggered by cron jobs to run on all users. These have been in place now for many months but after recent CB update (which now included the auto action batch limit feature) the PM's and emails are being sent out twice each time the cron job runs. From looking at the PMs in Plugin Management, the PM is sent to each user once, then after that, it is sent to each user again. The same looks to be happening with the emails. I have noticed that this does not happen when I set a batch limit. I would rather not set a limit if possible.
Auto actions build is 8.0.0+build.2020.04.17.17.38.41.bcf774668
CB version is 2.4.5, cant find the build number

Thanks for your quick reply.
I added a "-t 1" to the CRON jobs and it has seemed to fix the issue. I did recently change my CRON's so I guess accidentally omitted this option.
Having said that, I am getting a 504 Gateway Timeout error on the CRON job when not using the batch feature only. I assume this would be a server issue but if you know where to point me to fix it, that would be great.

Thanks again for your help.
I thought that might be the case.
I have multiple CRON jobs, each with a different "&do=something" in the url. Different auto actions are conditioned for the different URL's.
For clarification in regards to using the batch feature, if I have say, 800 users and I set the batch to 300, do I need to run each CRON 3 times so that it runs across all users?