One term that applies to these questions is scope-creep, which according to Wikipedia is:
Scope creep (also called requirement creep and feature creep) in project management refers to uncontrolled changes or continuous growth in a project’s scope. This phenomenon can occur when the scope of a project is not properly defined, documented, or controlled. It is generally considered a negative occurrence, to be avoided.
Whereas Wikipedia defines change-management, which also may apply, as follows (Emphasis is mine):
Change management is an approach to transitioning individuals, teams, and organizations to a desired future state. In some project management contexts, change management refers to a project management process wherein changes to a project are formally introduced and approved.
Thus, the project management side of the change management definition also applies to two of the three questions tagged by changes. One of them isn't about any kind of change and will likely have the tag removed completely.
When we do a Google search for "changes", we get David Bowie's "Changes" song as our very first result! It's a cool listen -- go ahead and listen to it and enjoy -- but it's not really related to what we do here. Searching for "change management" or "scope creep" give us results more closely related to these topics.
Thus, it sounds like change-management and/or scope-creep would be a better choice for these questions, both for readability and search engine optimization. After all, we want folks to be able to do their Google searches and find us next to relevant results. Sorry, David Bowie.
Here is what I suggest:
As for changes, for David Bowie's sake, maybe we can keep it as a synonym, or just get rid of it altogether. With only a few questions with a tag, creating synonyms at this point may be a bit overkill.