What gives the indication that K3 must be constrained to rows of length 24, turned, and then fit to rows of length 8?

Is K2 responsible for those indicators? The 6th line down contains the mispelled word UNDERGRUUND. The line is 32 letters long. The 24th letter us misspelled with a U in place of an O. There are 8 letters to follow.

"U turn at 24 and follow with 8?"