in hurry of filing correction return you should not forget to ensure that there is already a balance in the challan or not. it is you paid rs.10,000 filed return for the amount equalling that. now if you add 1 more name for rs.1,000 then there is no balance in the challan amount. hence it gets rejected / match pending. For that you have to file 1 more return .
hence before filing you should ensure that there is a balance amount left in the challan or now you pay the challan and file correction return.