Assigned Macro Name Changed

(Sorry, I peviously posted this to the Access Programing forum incorrectly. I will delete it there if I can figure out how.)

In a workbook, I have several buttons, both on a tool bar I created. I also have word art objects within worksheets. Each has a macro assigned to it. Recently, as I have made updates to the workbooks, I have noticed that the "assigned macro" that was assigned long ago is not the macro name I originally specified. For instance, I have a macro called pickit assigned to a button whose label, not surprisingly is "Pick It". However, when I now look in the value in the "assign macro name" field for that button, it has Group30_Click as the name of the assigned macro. There is no macro named Group30_Click in the list, nor have I ever created a macro by that name. The code for the pickit macro is still named pickit. However (and pehaps fortunately), when I click the "Pick It" button, the pickit macro still runs. Other buttons I have assigned marcro names to have this transformation to GroupNN_click names and all still invoke my originally intended macros.

What's up. There must be some feature I don't understand.