Yes. Everything is fine. Don't worry.
Mining is probabilistic in nature: if you find a block earlier than you statistically should on average you are lucky if it takes longer, you are unlucky. In a perfect World, you would find a block on 100% luck value. Less then 100% means pool was lucky. More then 100% means pool was unlucky.
We have seen 600%, 800% or even 1500% luck. That could happen and nothing we could do.
We highly recommend you reading this article Solo Mining Pools – Gambling for the 21st Century which describes what is luck in details.
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