When creating a new macro or attempting to import an existing macro the spell ID of certain abilities is being incorrectly translated leading to the wrong ability being saved.

Examples I have found are:
Backstab is being saved as Sinister Strike.
Shadowstrike is being saved as Ambush.

Yep - its actually not a bug. GSE stores the BASE Ability. It has been doing this for procs and talents for a while. It now uses Blizzards internal library to find that out and it works across specs. When you /cast Sinister Strike it will use Backstab based on your spec. Does the same thing with Flash Heal and Shadowmend etc. This was introduced in #724