Can you show the drawings or part of the drawings where you are having problems.
Better yet would be to show those and attach your parts, assembly and drawings (using pack & go).
It sounds to me like you use one assembly and are making an exploded view drawing of that - is that correct?
Then is sounds like you are making another drawing from the original assembly again but you are trying to again install all the missing components.
This is very confusing to understand what you are doing and why.
You should be starting with a complete assembly with the buttons already installed and add the missing parts to the assembly.
Then make your drawings from the completed assembly.
It is just very hard to understand what you are trying to do and why. We need more details.
Sorry I can't show you the drawing and the part and assembly files. To stay out of trouble in the future and save me the time also, I would like to redo the button assembly correctly.
Rick McDonald said it best and I would like to add this
It sounds like you are using interchangeable components, do yourself a big favor and collect all those files and put them in a folder and pull them from there, the same part in multiple files is a disaster..