Hi pixelator,
We haven't had this reported before.
From having a very quick look, I can see weekendpool.net has 62 miners. From memory, weekendpool miners are the total workers connected, not accounts (not sure if this has changed in the last few days). Hanapool has 60 connected miners (these are accounts, not workers). So when hanapool wins a block, it will be split between more accounts. I suspect this is the reason for the lower quantity.
We have been working on an issue with miningcore(the pool software) where the pool hashrate returned in the API is displaying higher than it should for Lyra2REv2. It doesn't affect the underlying hash it is a multiple applied to the display only. Here is a link to the issue:
https://github.com/coinfoundry/miningcore/issues/211