That's because interest on refund is also paid and interest is paid on refund even if it is below 10000. It does not have amt restriction for interest on payment of refund. Such restriction clause is in case of payment of advance tax.
Sry It is not Sa but adv tax. Yes my advance tax was more than 90% and the ITR for that year was still calculating the Interest u/s 234B and C. I paid a little more.
In 143(1) info sheet the Int calculated showed nil and i got xtra refund apart from int on refund u/s 244. hope this claifies