On the same network I have 3 pc with all AIS v9.0.2008.
On two of them I have 131213-1 VPS update popup appear each setting updated time (manualy 131213-1 is also the last one) and in my device avast tells me 131213-1 are old VPS with red cross.
On my third pc , I have 131213-0 , no popup , no new VPS aviable manualy , and no message for this device in my device : 131213-0 is OK (no red cross)
I think that 131213-1 might have been withdrawn as it isn’t listed on the http://www.avast.com/virus-update-history page, though this is somewhat different for avast 9 as this relates to the avast 7 and earlier versions.
So a manual update from my systems shows I have the latest version and that is 131213-0.