("http://electroneum.ovh" with whom the reward is 144 ETN / day but a block found every 5 days).

I don't know where you could have seen that we find a block every 5 days? We find blocks every days!
Previous database blocks stats: http://electroneum.ovh/old_pool/#pool_blocks
New database blocks stats: http://electroneum.ovh/#pool_blocks

For previous users, the stats from the old database

thanks for the work but the 'new' personal stats (hashrate/payment graphs) are still those from Thursday.

Hello, on the old database (http://electroneum.ovh/old_pool/), the charts were stuck on last thursday yes.
On the new database (http://electroneum.ovh/), everything is updated and up to date.