Are small income tax refund amounts ignored?

I submitted ITR-1 online followed by ITR-V and these were processed correctly for the AY 2012-13. However the income tax paid was a little more than required amount (about Rs100). I thought this will be refunded automatically. But till date this had not been refunded. I checked the refund/demand status page and the status for the AY was written as "Not Determined". What should I do? The amount is small and not that important but I want to know the procedure. This year a larger TDS had been deducted and hopefully I will receive more refund. So please clarify. (Is it necessary that the tax return be filed by some advocate/expert rather than by myself to get refund?)