Tachomaster card down load date errors

hi since the last overnight update we have a problem with the system recording when the driver card was last down loaded, although the days actually worked record fine on the calendar if there are days of no record these do not show on last download date, also a vehicle unit down load shows work done on the calendar but has recorded the actual last download date as over a year ago, tacho master have been informed but just wondered if this was happening to other users. alan.