Hi SueC1523,
Based on your post, I tried testing on my end, and I experienced the same thing. If I expand a subgroup in one section, another sub-group with the same name under a different section will also expand.
While searching, we found several similar cases, it seems like this has not started in the recent version of Excel, this has been a behavior from past versions of Excel
2007 Pivots - expand 1 section but not the others, how?
Expanding, colapsing only in one subgroup in pivot table
Clicking the Plus sign to expand a Pivot Table field expands all with the same label
How to a stop pivot table from expanding all groups.
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We further tried finding a setting to change this behavior but seems like there’s none, I suppose this is how expanding/collapsing works. Sorry to deliver this news.
We appreciate your understanding and co-operation.
With sincerest regards,
Neha