Hi, im since 8 Days mining on your pool with aprox 9 KHS. Since 4 Days are my stats like freezed

Payout for example shows "Paid 280 ETN" .. but got already 2000+. Is the frontend hanging a bit?
Nope, don't have any problems. Frontend is extremely fast.
Re-check the login you've specified in the dashboard. Don't forget to append ".payment_id" suffix if you are using one.