Which routine? Who designed it?
In the last four months, you must've started ten different "how's this routine"-type of threads talking about ten different routines. I'd put money down that you're mindfucking yourself into non-progress. You need to be on a program written by a qualified coach and you need to stick with it, to the letter, for several months.
That'd be the way to do it, yep.
Very normal. Don't sweat it unless you start regressing in pull-up strength a few workouts in a row.