Everything is running fine, it's just really shitty luck.  2x 4(+) hour blocks in close proximity pretty much nukes the blocks per shift for most the day.  A 4 hour block is (roughly) a 7x difficulty block.  These are not extremely rare, but it is quite rare to have 2 of them very close together.

I suppose this is payback for when Guild found 11 blocks in a row the other week.