I can tell you I hardly ever watched it. I was in my late teens and twenties...and even though I dated young ladies, they were past Little House age.
I only knew that because she was talking about it one day and I had to search to find out which one she was.
So I can understand the mistake. I made it myself.
I was in my 20’s & 30’s. It was too much of a chick show for my tastes back then, and yes the girls were not of the age that caught my attention for sure.