gui design - What is best UX to avoid 6 buttons and how to make it more user friendly?

scenario 1

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  I am working on a Financial web application. In application, Sections are parent level and groups are child of those sections. When user at parent level user can see all groups. I want to map those group(s) with category(s).

  
  
  

  I have icon after that group name to map with categories. I want to map one group to many categories and many groups to many categories. After clicking on the icon, I will see this screen(Image 1 and image 2)

  
  

scenario 2

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  In this screen I have "Groups" and "Categories" Grey color indicates my selection for the group; clicking next selects Group 4, clicking previous selects Group 2, etc. I can select categories for each group, and I can a add category by clicking on the add button. I have 3 buttons at the footer:

  
  
  
  
  • Save and Previous - Save and go to previous group
  
  
  • Save and Exist - Save and exit from this screen
  
  
  
  • Save and Next - Save and go to next group
  
  
  
  

For scenario 1

• What will be elegant way to map with group to category(s)? Should i use one group at time and mapping then next group?(as shown in the image 2)

Any better suggestion for this scenario ?

How should i show on header for all groups ? - Should i show all group as title or explicitly has to completed flow.

For 2 scenario

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  I want to avoid a large number of buttons, as users may feel confused with this layout.

  
  


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  Is there a better UX for this design?

  
  

Image 1

I have modified screen. Do you have any suggestion for that screen ?

Image 2