I wanted to find something so in the KM editor I selected the "All Macros" group and then typed in the word "manipulate" into the search field and what I got as a result was unexpected.The search pulled out 5 macros none of which have the word "manipulate" in them.
The KM Editor is finding this macro because the base name for this Action is "==Manipulate== a Window". The Title you see changes when you change the specific action (like "Center at") is selected.
There are a number of Search Filters that you can apply, including limiting the search to text in the name of the Macro. See Search Strings .
No problem, but it is really not a "rookie mistake". It is NOT obvious at all that the target Action has a base name of "Manipulate a Window" that will be found by searches.
There a number of KM Actions that have this feature, and even other synonyms to help finding the Action in the Insert Action by Name dialog.
This probably needs to be added to the KM Wiki Search page.