Can any one please Tell me this..???

Hello to all...Im very sad now...bcz i faced a Deduction of 5 points...Today i uploaded a picture of my neohew just moments ago...

And i got 16 upvotes on that picture....

But now after almost 30 minutes i checked that post and Saw tht 16 Upvotes were reduced to 12 and my 5 points were also deducted...

I dnt know why this happen...im not posting this to complain...

I just want to know Why this happened..? If any one know about this so plz tell me in comment section so that i dnt repeat that mistake