STILL testing our new system,

our users are saying that they are having a problem with serialized items. They have 2 complaints:
First they don't like the popup asking for serial number when entering the sales order. No problem I know I can change that setting in the Sales orders defaults. Typically we do make to order, so serials are not assigned at the order entry point.
Second, they complain that Evo does not allow them to enter the serial number when they release the order prior to processing invoices. They say in this version of Evo, though they can bypass entering a serial number at order entry, if they do not choose the serial number at the order entry level, it will not let them choose it until the invoice is being posted. Right now, it is done before posting (at release?).
Is this also a setting someplace I have to fix? Please advise. they are telling me this is preventing them from giving me the OK to move us to this new version.
Thanks in advance,
Val