Indian Railway Catering & Tourism Corporation [IRCTC] — Tatkal ticket was booked for wrong day, cancelled but no refund

Website:

irctc.co.in

IRCTC website booked my ticket in tatkal on 10th March, why the ticket was showing date of travel as 12th March it should have been as 11th March, hence I am asking for refund, if your site was showing correct date, I wouldn't have cancelled that.
That's a bug in your system, and that's why I cancelled the ticket & asking for refund.
Let me know if I am wrong.

I know railway rules but what has been is wrong, booking of a later date in tatkal quota is not allowed.