This question makes no sense, and the answer doesn't clarify anything.

When moving system databases, I can't find any documentation that says it has to be in a particular order. If it were required that it be in a specific sequence, I would think that Microsoft would have said so in either BOL or MSDN.

Here's the MSDN article on the subject:

http://msdn2.microsoft.com/en-us/library/ms345408.aspx

I can't find anything in it that says it has to be in a certain sequence.

It looks to me like the author of the question was confused by something he read and didn't understand. I'd like to see some documentation otherwise.

This web page is considered a very reputable source for data about SQL Server. This question (like the age calculation one a little while back), could actually result in spreading confusion. I really do think there needs to be some vetting on these.