Cataclysm Kill shot macro is sometimes not working

[ozzymagnum]

#showtooltip Kill Shot
/use !Aspect of the Hawk
/castsequence reset=0.2 0,Kill Shot
/castsequence reset=0.1 Aimed Shot
/run UIErrorsFrame:Clear()

This is my killshot macro with aimed shot in it, it works alot of times but sometimes it wants to use aimed shot instead of kill shot, someone knows whats wrong?

[Dethosis]

This is Druids forums, we don't want your filth here!