So I've read up on this plan aski frost heard about it on glow. But I'm not sure how I should go about doing this. I've included a pic so you can see the plan

as you can see it says to start
BD on cycle day 8. And every other day till
opk.
That's great but last month I got a pos
opk on cycle day 11.
So That means I'd BD cycle day 8, skip cd9, BD daily cd10 until cd12. That seems like no time for DH to build up his sperm.
Thoughts? Hopefully this isn't confusing.