Opus updates certain parameters only after a button has finished. The next button will then use these values.
To force Opus to feed updated values to the next stage, try turning the three buttons into three User Commands and execute them from a single button.
The best approach for the task would be a script. I'd recommend putting in the effort to learn scripting. Using regular command buttons can become frustrating rather quickly.
In this particular case, a standard button can still do the job:
@nodeselect
@nofilenamequoting
Copy FILE="{file}" EXTRACT=sub HERE CREATEFOLDER="temp{file|noext}xyz"
Copy FILE="{sourcepath}temp{file|noext}xyz\*" ARCHIVE=.7z TO="{sourcepath}"
Delete FILE="temp*xyz" QUIET