Because of bad luck. It happens sometimes, though on average we're more often lucky than not.

Nope, @Oliver will close it.

Maybe they had Coinfoundry as a fallback pool?

yep, someone pointed that much hash power here for quick few blocks and left.. I guess they were just testing something

So the that block was just 59% effort. Likely, the pool's hashrate here was much lower back then, possibly even less than half of what we have now.

About a month ago we hit 3 blocks in a day, and since then the pool's hash-rate has stabilized higher. The difference between the payouts is just about right.

This is just an extremely unlucky variance right now. It's rare, but statistically can't be ruled out.

That means that you have to be patient. No one knows when we find the block, one can only estimate, but mining allows for crazy variances, so even if I were to tell you that my estimate is that we find the block in 2-3 days, it could easily be in 5 minutes or in 10 days instead.

There is no progress in mining. It's not about completing a block. It's a 0/1 game. You either find the block or not.

So the classic question asked around here from people that have not educated themselves on the basics of mining. Read the FAQ, particularly where it says "When will I get paid". To sum it up, your balance only increases when this pool finds a block. Last VTC block was found 8 days ago. Thus you have only accumulated shares. When we find a block, you will be rewarded based on your share contribution in the PPLNS window. Expect such a reward significantly larger than what you would get on a large pool that finds blocks every couple minutes or hours.