Hi Jiangao. I had similar problem few months ago, with C3 Kreutz reported the same time by me and Zhijian. You submited this comet via SOHO Hunter group at
Hi all, This comet report at the real same time to Karl at 9:44:39(UT),and mine is 9:44:??(UT) More position is below: picture size: 1024 * 1024 picture