Bug again and again (Duplicate Army lol)

Http://prntscr.com/1r0kra

How come blue's little blitz stack can destroy my PD stack, and defend the cap simultaneously?

And how come his stack doubles?

self multiplication by mitosis? or its now the era of genetic war?

This happened in a 3v3 with me. To my advantage though

What if they're using lucky bastard?

In some cases I have had extreme criticals beyond max attack which I found very strange, maybe neutrals got really low defence. Sometimes it has been against me too.