I do splits too, but I didn’t know that they were called splits.
I divide my routines as back and biceps, chest and triceps, and I breakdown the lower in front and sides, back and gluteus.
I do this way because every time I’m doing chest exercises it involves some triceps, same thing with back and biceps.
Almost forgot, I add some shoulders there too.
This is a common routine called Push and pull. It is the one I've used the most. I'll write down a post with quite a few examples and write what are all the routines good for and what disadvantages they've got. The one you do I like since you can use bigger movements to save time while working on more than 1 muscle with each exercise.