That looks about right to me. Looks like you mined with ~720Khash for about 20 hours and will recieve 2.2V from that. Normally you'd expect to see almost exactly about 2.5V for that, but we were a little unlucky during that time period.

It looks like you've either had problems with your miner, or connectivity issues, which has caused a lowered hashrate. There is an alert on the site about the connectivity issues, its only effecting a few people, but we are adding geographic stratums to fix similar issues in the future.