MN/PE1 and related Mobility MN/PE1>iM Mobility?

For the Stiff Leg Windmill it says:
"To move to the next progresssion, you must be able to perform 5 sets of 5r along with the coupled mobility"
 

First how is this to be perfomred with its related Strength exercise MN/PE1?
Should you do 5 and 5 on each side.

Also why does it say "along with the coupled mobility" if it is already classified as a mobility?

Why is it different than all the other Mobility exersises with its own Block 1,2 and 3?

 

 

It's just a typo, thanks for catching it. It should read as the others, with 5r /side after each PE1 set.

Got it.

Thanks.