Sales Orders with Ship Method get scheduled when calendar is closed

Hello!

Does any of you know what do I need to set up in order to have scheduled ship date defaulted according to the shipping calendar when i have ship methods in for the order lines?

Currently we have several orders in the system which all have ship methods in, and we noticed that for these orders, the system is reverting schedule ship dates when the shipping calendar is closed. It should give the date prior the closed period or after.

For all other orders which don't have ship method, the system is scheduling them just fine.

Thank you.

Adel