Completely delete those macros. Now.
Now, create the following macros.
#showtooltip mangle (bear)
/cast mangle (bear)
#showtooltip faerie fire (feral)
/cast faerie fire (feral)
#showtooltip swipe (bear)
/cast swipe (bear)
Now, put those on your hotkeys.
Whenever you press one of those buttons, it will do maul on the next attack, as well as do the second line of the macro, whether mangle, lacerate, etc.
The priority order is Mangle-> If Lacerate is at 5 stacks and is about to fall off-> Faerie Fire if it's not up or if Lacerate is at 5 stacks->Lacerate to 5 stacks->Swipe.
You should be spamming the next button you're planning to do, so that you replace the vast majority if not all of your melee attacks with mauls.
For multitarget, spam swipe and switch targets often so that maul hits other targets.
For heroics, Glyph of Maul is very useful.