The other thing not clear is which last 6 digits to use.

The illustration on their site shows a bar code with 13 numbers: 1 outside the barcode, 6 numbers, a gap, and then the the last 6 highlighted (all within the main 'body' of the barcode).
X XXXXXX XXXXXX

On my package (a Legion toy) the barcode only has 12 numbers. 1 outside-left the bar code, a set of 5, another set of 5, and another number outside-right the barcode (not illustrated in the example).
X XXXXX XXXXX X

So I put the last six from the set of numbers within the barcode in, ignoring the dangling number outside (which doesn't not appear in the official example). But I think I probably stuffed up, right?

What did the winning people do? Have any of you used a Legion-class barcode and won and which numbers did you put in?

It shouldn't be this confusing or hard