This behavior shouldn't happen...
The way the reader is coded, when you finish a chapter and click "next page", it should skip all other chapters with the same number and go to the next highest chapter number.
A few bonuses include:
1. The reader treats "Volume 1, Chapter 4" the same as "No volume, chapter 4", so you shouldn't have to worry about that.
2. The reader remembers what group you are currently reading, and prefers to stick with that group with the following chapters.
i.e. If Group A and Group B are doing the same series, and the uploads are in the order of [Chapter 1: A], [Chapter 1: B], [Chapter 3: A], etc etc and you start reading Group B's work, it won't just jump to the next "closest" chapter ([Chapter 1: B] >> [Chapter 2: A]), it'll try to stick with the group.
That being said, if there's an omake ([Chapter 4.5: A]) or something that only Group A uploaded, it won't skip over that just to stay on Group B chapters.
And all of this is me telling you that we'll need a bit more info to diagnose why your reader is not following this pattern...