strange behaviour on clicking button (4 replies)

I have a table on my first screen which shows reservations. It also has buttons for Add, Modify, etc and everything works as expected.

I also have a button that goes to the current day with the code:
HSeek(RBL_BRES,TOUR_DATE_TIME,Today())
TableDisplay(TABLE_Reservations,taCurrentFirst)
When it is clicked the display changes to show the reservations starting with today. So far, so good!
But now if I edit one of the records, when the Edit Window is closed the browse screen no longer shows the current record. It appears to go back to showing the entire file.

What an I missing?
Thanks
Garry