Pre Order

No, you can't split an order as the possibility is currently not supported by our Pre Order extension....

It is a simple product status which is taken into account. This means that the stock status of a configurable product, for example, will depend on the status of the simple product which is currently selected....

Yes, there is a special column where you can filter pre-orders:
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It’s possible to complete this action from Magento product grid provided you have an option to sort products by category (this feature is missing in Magento out-of-the-box but can be added through customizations or extensions like Extended Prod...

Unfortunately, you can’t create such restrictions with this Pre Order extension....

At the moment the extension doesn't send back order email notifications when pre-ordered products come back to stock....

The product’s Availability is Out of Stock.
Solution:

Turn off the option that automatically enables the Out of Stock status for products that reach a particular quantity limit.
 One of possible solutions is to reconfigure preorder se...