Harlem Line yesterday

So yesterday I was in Westchester for several hours.... I used the Harlem Line four times and the New Haven line twice... (Lots of traveling I know, but I have to visit folks all over the place).  The New Haven Line had seats both going and coming, but the Harlem Line was like a sardine can two out of the four rides that I took.  The only time there were any seats was very early in the morning when I left Grand Central to make my first trip.  It made me wonder if there was a shortage of trains on the Harlem Line yesterday or what?  The one plus was my ticket wasn't collected on two out of the four trips, so I'll have those tickets for the rides next time...