saveas function saves more than one file type

For some reason that I cannot determine, if I try to save a figure as a .fig file using the saveas function (either from the command line or in the GUI), it saves my figure as a .fig , a .pdf , a .emf and a .png . Every time. No matter what I put in the command line, it always saves every file as all four of the above figure types.

Example:

saveas(gcf,'test','fig')

produces test.fig , test.emf , test.pdf and test.png

saveas(gcf,'test.fig')

produces test.fig.fig , test.fig.emf , test.fig.pdf and test.fig.png

If I go to save a new figure as a figure file named test.fig using "Save" from the GUI File menu, it saves the file as test.fig.fig , test.fig.emf , test.fig.pdf and test.fig.png . Making a change to the file and saving again (just using "Save") saves changes to all four files.

Similarly, if I go to the "File" menu in the figure GUI and select "Save As..." and attempt to save my figure as a figure file named test , it will save the figure as test.fig.fig , test.fig.emf , test.fig.pdf and test.fig.png. (Also no clue why it insists on adding that .fig to every file name when I do this.)

I have not exhaustively tested saving as all other types of files, but if I specify to save as a .png or as a .emf it only saves the figure as those file types. This seems to happen only when I try to save as a .fig file. What could possibly be causing this?