I shouldn't be alive - Season 5 missing eps?

I see on a lot of sites(such as TPB,BMTV,BTN,TVT) that the first 8 episodes of season 5 has been uploaded by a scene group called CRimSON. The last 4 have aired a long while ago and still not been uploaded. I found eps 9 and 10 on warez-bb. Looking for the last two of the season which have been aired -

Ep 11 - Perfect storm

Ep 12 - Lost in the jungle.

So why isn't the scene uploading the remaining few which have already been aired , whats with the holdup? Where can I find these? :unsure: