We have recently started using the PO part of the system.  Ive setup a number of  additional fields to show on my PO.

 

When I raise the Po all of my additional fields show.  Once Ive completed the PO however, if I generate the PO copy by using ACTIONS  email to Vendor, one of the fields (cost centre) does not show on the generated copy.

 

If however I choose, print preview of the same PO and then choose to 'send' (email) that to the same vendor all of the fields are present in the resulting PO.

 

I have shown this in screen shots in attached.

P.S when trying to attach a file from desktop using Internet explorer on your site, it doesn't work....works with Firefox.