Hi,
Please elaborate how the cycle count is been performed. The standard process of WM cycle count is in the below link. there the date of last inventory count at quant level is updated. There may also be reason that the cycle count was not performed on the quant earlier, so there might not be any date to update.
http://help.sap.com/saphelp_46c/helpdata/en/c6/f848d14afa11d182b90000e829fbfe/content.htm