Those are not "glyphs", they are actual additional spells you learn - not modifying another one. You can't unlearn any other spells once learned, can you?
the seperate stag form is the "people can mount me"-form, which was a glyph in wod.
Your travel form is still on one button. Go to a "no fly outdoor"-zone and test it.
My travel form (through glyph) is the gepard and so i can choose between stag and gepard whenever i want...
edit: or test it when you are in combat (much easier).