Tony,
The populate function didn't work correctly in 71 it was only corrected in 72.
What do you mean they remain do you mean the populate function state there are 5 aircraft to be updated, even after your 5 unknown have populated, or do you mean they didn't populate.
The database update available this morning gave the figure of 225027, can you advise which were the 5 unknowns you picked up today please as if you mean they didn't populate they may not be in the database.
Sometime it takes more than on run of the populate function to get them all in. Also populate only populates for the myview view you are in at the time ie today, if it is outwith that view ie, You noted the unknown in the last month but are in mylog for today it will not populate but it will show as unknown when you try to populate. It may well be there are 5 unknowns in your mylog outwith the view you were in at the time and they are still unknowns. Try running reporter for other view and if there unknowns in that view they will show at the top of the report.
Alan