I'm using set of 20 macros on my 4 shaman to heal in rotation.

The macros are like these: (I got the idea from http://www.wowwiki.com/Multiboxing_Macros at the bottom)

/castsequence [target=party1] reset=alt,combat ,Healing Wave,,
/castsequence [target=party2] reset=alt,combat ,Healing Wave,,
/castsequence [target=player] reset=alt,combat ,Healing Wave,,
/castsequence [target=party3] reset=alt,combat ,Healing Wave,,
/castsequence [target=party4] reset=alt,combat ,Healing Wave,,

On 2 of the shaman the macros will not reset when alt is pressed instead alt makes the macro loop.
The macros work fine on the other 2 Shaman.

Can anyone help?

Thanks,