I think that is indeed the joke. Sort of a twist on the old “insensitive sergeant” joke. The sarge needed to break the bad news of the mother of one of his men having died: “All of those with both parents living, please take one step forward. Not so fast, Private Smith”.
There are lots of variants to this, such as the wife dying or the role of seargent being replaced by a boss firing one of his employees.
@ yellojkt (1) - The strip is “current”, but comes from a zombie feed called “Luann Again“. To quote GoComics: “LuannAgainn is a time-machine that plops you backwards to LUANN 28 years ago on today’s date. The strip debuted on Sunday, March 17, 1985. On March 17, 2013, LuannAgainn will relaunch LUANN in all her amusing, embryonic glory…”
Seeing as that the same comics are still available on the primary Luann calendar (compare this link to the one above), the “new” packaging seems to be a supreme example of superfluous retreading.
@ yellojkt (12) - The way that Hank Ketcham abused the name of his own son for his personal profit makes me shiver. The comic strip is worthless now, but it was once worth reading. Why couldn’t Ketcham have given the strip (and TV show) a different name, and saved his son from all the taunting to which he was doubtlessly subjected?