David: at some level aren't you glad we're paying this much attention to every little detail
I think that my readers would make great editors!
Okay, it's a definite typo. Should be:
Beat one - bass note
Beat two - Em chord (downstroke)
Beat three - rest followed by Em chord (upstroke)
Beat four - Em chord (downstroke and upstroke)
In other words:
Bass - Down - Up - Down - Up
If anyone else needs me I'll be lying down wondering what else I've messed up!