You probably don't have your aquatic form yet, do you?
The addon uses macros for this stuff in the same way you could use macros without it. The macros for shifting are based on form-position in the specials bar, which can't be changed by you. The positions the macro uses assume the forms will be in their "final" order, 1=bear/dire bear, 2=aquatic, 3=cat
if you don't have aquatic form yet, your cat form is in position 2, so the addon won't work properly. Bear form works because it's always position 1 and caster form doesn't have a position, it's just the absence of any form.
