Umm I seem to have made an error here.
I'm only temporary resident, so my posts were relating to my situation which I now see is different, so sorry about that!
I think you are completely safe PR wise. You can pretty much come and go as you please once you have that. It certainly isn't restricted by 6 months in 12.
The 6 months in 12 was quoted with Temporary Residence in mind and is still somewhat unclear to me! I guess I saw that in the initial question and thought that you were referring to my situation as that point seems linked only to a temporary residence situation.