ok.. so I have a question about the minimum 512 difficulty on stratum... 

How does that affect things when we are mining a coin with below 512 difficulty?  For example, lets say we are mining Xcoin with a current difficulty of 400.  I find a hash with difficulty 450, but it doesn't get sent cuz stratum is only sending 512+.   Does that mean the pool just missed out on finding a block?

I'm hoping this is just a case of Difficulty does not exactly correlate to difficulty.. 

Hoping someone can enlighten me..

thanks,
Sigg