It doesn't appear to be a misprint and with the addition of TD and TS, that may have been an easy spot to trim the schedule to fit those classes in on Friday.
With the way car counts and the cost of racing are these days, does TAD & TAFC need 4 qualifying sessions? Seems like they always lose one to weather that weekend anyways.
One of the consistent complaints I hear from alky racers about Indy is, how long the race is, one less qualifying run would shorten it up a little bit more.
The final TAD & TAFC qualifying session at Indy is always one of my favorite qualifying sessions to watch.