No Codes shown in Customer Email

-- HikaShop version -- : 3.2.2
-- HikaSerial version -- : 2.0.2
-- Joomla version -- : 3.7.5
-- PHP version -- : 5.0
-- Browser(s) name and version -- : FF Quantum 57.0.4
-- Error-message(debug-mod must be tuned on) -- : none

I have tried to set up HikaSerial but it is not working, here's what happened:

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I did this:

1. set up a Serial with codes like this:

serial000
serial001
serial002 ...etc

2. Assigned to a Pack, Pack Data SQL

3. Attached to the Variant of our Product

4. Published 'AttachSerial' Plugin

FIRST TEST PURCHASE:

*ALL* 10 of the codes was attached to the email. (see Screenshot)

ALL OTHER TESTS SINCE THEN:

No codes attached to any emails.

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I repeated the entire setup with a new Serial, formatted like this:

"code 0", "Serial000"
"code 1", "Serial001'
"code 2", "Serial002'
...etc

Added to a new Pack.

Added that Pack to the Product.

But no codes at all are in the emails.

Please see attached screenshots and thank you so much for any help.

Ok thanks so I have the Serials importing ok now.

I have a couple of issues I cannot fix.

1. Serials are only attached when order is marked : "SHIPPED".
They should attach when order is marked "CONFIRMED" as that is what PayPal sends after payment.

2. Serials are taken from the list in random order (e.g. first one taken was ...00004)

I've attached screenshot of my HS settings.
They show Assignable Order Status of 'confirmed' and Use Fast Random = No.

Many thanks
Paul