Gridview edit not working Second time but working fine for first time

Hi iam editing the data using gidview
for first time it is working ,but in second time without refreshing the page i am getting the error
it is taking the values twice as
nearest_ro='gffhfgf',power_avai='sdfdsf',water_avai='bbbbbb',terrain='aaaaaa',title='zxcxzc',anroachmen='xczx',nearest_ro='gffhfgf',power_avai='cccccc',water_avai='bbbbbb',terrain='aaaaaa',title='zxcxzc',anroachmen='xczx'