We are over careful with version numbers.
In the past people synonymized all sorts of wrong synonyms like .net-3.5
-> .net and so on.
It is common to mistake a tag synonym with a tag hierarchy. The intention with synonyms is to catch cases where two tags are exactly the same thing like c-sharp
-> c#. We use the synonyms to enforce consistency.
When analysing the mistakes people made I discovered that if a number is involved, in any way, on either side of a synonym a moderator should get involved.
Take your specific case:
matplotlib encompasses mplot3d see: http://matplotlib.sourceforge.net/mpl_toolkits/mplot3d/index.html
However, mplot3d contains no
2d functions that are contained in the parent library matplotlib
The synonym you are trying to suggest is, in fact, wrong. The system is doing the right thing here.