If you missed a workout, you can just do that one next. It does not matter whether or not you lift on the same day of the week or not, and it doesn't much matter if everything gets pushed back a day or so from what you originally planned. What does matter is that you do the workouts and get the work in, whenever.
I would not skip one of the workouts, like by just not pressing or not squatting one week. If you don't want to just push everything back, then yes you can just do squat and press on the same day, though you might need to cut back on supplemental and/or accessory lifts.