>>> #3408 for my 17" PowerBook G4 1.67 MHz. I received my key file on Nov 7th, 2016

>> that number somewhat contradicts #3413 on Nov 2n, 2016.

> I don't why it contradicts [...], I was received my first email from MorphOS support on Oct
> 30th [...]. [...] a few days later [...] I finished payment. [...] on Nov 7th [...] I've got my key file.

For the purpose of this thread, it's more important when you got your first email (Oct 30th) because that's when the number is created (it's in that email after all). Normally (i.e. payment completion directly following receipt of first email) the difference doesn't matter because the MorphOS team is usually very fast at issuing the keyfile. In cases such as yours (i.e. payment completion only after some days passed), it's better to give date of first email so to not cause contradictions with other users' data.