Hi Simon,
 

do you have some attribute that decides which orders should be scheduled when?

If you do, you can easily add decision split that checks if is that attributed planned 10 days from today, if it is, then to the flow, if it’s planned in 14 days then do that flow. I will also suggest to have an attribute with Status Created/Planned so that you can retrieve at the begin of the flow only Created orders and also at the end if you have planned them 10/14 days ahead, to change the status to Planned, so that schedule event don’t retrieve them again.

I hope this can help you.

Kind regards,
Domagoj