Whats goin on with minergate?

So I have been having an issue mining bcn on minergate lately. I have been using minergate profitability calculator lately to see how much bcn I should be pulling in and I'm not pulling anywhere near the amount I should be. I understand the difficulty has went up, but their calculator should be updated for that. I should be pulling in about 120-140 bcn per  but within a 10 hour period I only pull 20 bcn. This is far off from their calculator projections. Does anyone know a possible reason for this issue?