What has happened to my mylot earnings? It has gone down instead of up!

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I have been here just for three days now. Four hours ago, it showed that I have earned a total of $0.80. Now, it shows as $0.75 and it says it has been updated just 35 minutes ago. I have posted atleast 7 posts after the initial amount. How can the earnings go down? Has anyone have any idea? Has it happened to anyone of you?Please help