Ranks as shown
When updating with early war information the rank entered is junior to the one shown on the medal card. The system updates to show the junior rank. It would be better to leave the more senior rank.
If you know dates for the ranks, or at least dates at which they were known at each rank, the latest rank will show. You can do this by adding a date for 'known at' - a rank known at February 1918 will then show in the header in preference to a rank known at February 1916.