Hey,
From my testing with the same setup it did insert a work order for Apr-04-2016
It's tough to say why it skipped Apr 4th (which is the Monday) when inserting your recurring dates. I'll play around with recurring dates to see if I'm able to find a reason. But to save you time if that is the only Work Order it skipped, insert a work order for that date to the series manually.
- On your Work Order List screen click on "Edit Serires" for that Existing Work Order
- For your Recurring Dates choose Apr-04-2016 and click Insert Date.
Verify you now have a Work Order for that date on the above grid.
-- Mortaza