1)When i start to mine in this pool the 3 to 5 first blocks are shown in stats as i never submit a share, and i don't receive any payment for those blocks
This looks exactly like you forgot about stats delay.
2)Also in last days i put a counter for shares submited, and again start monitoring, I detected that the shares are not asigned correctly to each block resolved. The stats system take an amount of my shares subtimted to the blocks that are resolved in a few minutes, and those shares from fast blocks are asigned to the fat blocks that are resolved sometimes in hours, and as result my payment is lowered from 10 to 40% less.
No, it doesn't works this way. Check again about stats delay and check if your timezone is set correctly so you can see in stats which block was solved at that moment.
So, i also sended before a this info to the mail address shown on deepbit web, but at this moment i don't have a response...
Never received it.