Default Currency Issue... Seems bug

My currency is INR (Indian Rupees) ₹

I updated localization and added INR, mark it as default and 1. Disabled all other currencies here.
Then in Setting -> Local -> selected default currency as INR.

I checked and it start populating CORRECTLY.

Later NEXT DAY when i opened my site http://www.shhoppy.com it was again reverting to $ showing values in $. Like my price was ₹499 = $7.98 (for today 22 july) so in place of ₹499 it was showing $7.98 even when all currency settings has been changed. My local customers do not understand $ and conversion. I am afraid they will start leaving.

Please help why this is happening? can you please open my site and check, which currency it is showing - ₹ or $ ?

Bug declaration on the topic's subject line, no OC version posted.