Quote Originally Posted by 'shaeman',index.php?page=Thread&postID=82606#post8 2606
Your last couple of examples your mage is casting arcane missiles which is a channeled spell. If you were pressing the key for the next spell then I believe that it will stop the channeling and do the next spell, which may be a waste of mana on the mage if you dont wait for the channeling to finish (But then means your other chars wont be doing daamge while waiting).
You can avoid the channeling interrupt by starting the macro with /stopmacro [channeling]