Creating or moving groups a problem – Numbers Review

I used a black blank template. An Apple tech support creative adviser confirms the app does not allow me to create a group (insert) between created groups. The tech also confirms that my iPad has the latest updates and the Numbers app I used is the most updated version. What actually happens, is the app seems to randomly choose the location of the newly created group (either below the last group or somewhere in between groups not chosen by me. The tech agreed that the app shouldn’t do that but would not confirm if that is “normal” for this app. The tech could not resolve this issue. I welcome any instructions on how to do this task for I’ve yet to learn how to do create an “inserted group” at a desired location. The best I can do is drag that group and move it to my desired location. I will change rating of this app as I learn its limits.
Review by Adamu1248 on Numbers.