Actually 53 minutes and 2 'live' shares are not enough for statistics.
For the best p2pool performance it is much better to run own local node near your miners, here is example:



This was private node with 100% fee for testing purposes.  Lower miners qty per one node works much better also.


The same node with remote miners with good connectivity and ping below 40ms give you also quite a lot of DOA hashrate about ~10% and more DOA shares also. But I never tried p2pool w/ ckproxy.. I think this kind of design issue..