There are 2 differently dated sets of shows for Hearts of Harmony. If your last show is 48-04-16 - Program 1840, your set is in part dated and numbered incorrectly.
That the shows are misdated is verified through the end announcements on Friday shows to tune in Monday. Also the October 15, 1947 show can be verified b/c a contest ended that day.
Starting with 47-05-20, the "wrong" set is behind by one show because there should be no show for 47-05-20.
47-05-20 - Program 1602 s/b 47-05-21 - Program 1603
47-05-21 - Program 1603 s/b 47-05-22 - Program 1604
etc.
This pattern continues up until
48-01-09 - Program 1770 s/b 48-01-12 - Program 1771
then 3 shows are missing, so the "wrong" set is now 4 shows behind
48-01-12 - Program 1771 s/b 48-01-16 - Program 1775
48-01-13 - Program 1772 s/b 48-01-19 - Program 1776
etc.
This pattern continues up until
48-01-29 - Program 1784 s/b 48-02-04 - Program 1788
Then the "correct" set has 7 shows missing. The "wrong" set is now behind by 11 shows.
48-01-30 - Program 1785 s/b 48-02-16 Program 1796
48-02-02 - Program 1786 s/b 48-02-17 - Program 1797
The last show of the "wrong" set
48-04-16 - Program 1840 should now be 48-05-03 - Program 1851
If you have made it this far without your head exploding, congratulations.