I disabled the network hashrate field on the block explorer because it's not accurately reporting the network hashrate, so it doesn't really offer useful information on its own and would just confuse people to see a massive number there. The difficulty is being shown with an incorrect decimal place due to a bug in the value returned by biblepayd and I haven't had a chance to patch the Iquidus source yet as a temporary fix.

You can just use the getmininginfo command if you want to see those values.

-edit-
Difficulty field should be reporting correctly now.