I don't know for sure, but i suspect that difficulty numbers are powers of 2, except for 1, ie 1, 2, 4, 8, 16...
 5 is probably 4 in actuality. But I could be wrong, this is just a guess on my part. I'm sure someone who actually knows will correct me if i'm wrong. I get corrected a lot...

You are saying that current "Difficulty" is the same as pool difficulty? I guess i can see this, but then we are returning a lot of unusable numbers as proof of work.

Actually, the law of averages isn't really a law, it is more of a suggestion or belief. A coin toss has a 50/50 chance, even if heads came up 500 time in a row previously.

I feel your pain, i only have about 16 Gh/s. thes bad days are painfull.

I am not sure what you are trying to tell me.
Where should a difference between "pool difficulty" and "current difficulty" be? The pool has to relay a block hash fulfilling the current difficulty to the network in order to have it accepted as valid, so of course we are working on problems of the same difficulty as everybody else, no matter whether in a pool or not. And yes, of course we are returning a lot of unusable numbers - every hash not fulfilling difficulty is unusable. Of the millions of hashes your miner calculates per second only some are sent to the pool, to proof you are trying, but only the one share which "solves the block" is actually useful - all the others are just for distributing the coins based on hashing power.
If we'd all be honest, we could just drop all shares not matching diff 65m and tell the pool, how much computing power we are using.

I 'm not confused we were talking about local share submission difficulty before i was corrected. I think.

I don't know about difficulty, but i'm balanced between two pools over the last 24 hours and the other pool is pulling 5 x the BTC. I am too far away to change it and messed up my port forwarding for ssh. so just have to wait it out and hope it gets better.

exactly. look at the pools graph. We always have insane luck and insane bad luck....
and when we have the insane bad luck it is always blamed on DIFF as if suddenly the diff changes that day, then a few days later we have insane luck. which I think I will start blaming on DIFF to equal it all out

is the pool still maintained by slush or is he completely busy with Trezzor?