Hi @p.ruijter have you saved the project as the deployed version since disabling the schedule? 

Yes many times.

Thanks for confirming. Which version of TimeXtender are you using?

20.10.32.64

Hi @p.ruijter I will create a support ticket for this in order for us to investigate further

Hello @Christian Hauggaard,
I have deleted the Execution Package, saved the project (as deployed version). Then made a new Execution Package and a new schedule. Of course saved again. 
Last night I had just one execution in stead of 2. 
I think it is a (minor) bug that a deleted schedule still works. I have not the time to fully to reproduce this issue.
The workaround is to delete the Execution Package and make a new one. 
For me this ticket can be closed.