End of the Futhark...

I've been studying up on the Elder Futhark, and have noticed there are two different presentations of their ordering:

-with Othala at the end
OR
-with Dagaz at the end


Anyone have an idea as to why there is a difference? Are there any runestones with different orderings?

It's a reconstructed "alphabet" (I mean the name futhark even), so the order is a wee bit arbitrary and people just have stuck with whatever they heard so far as I know. I think my notes had dagaz as the last one.