My guess is that Word 2011 cannot handle combined diacritical marks, and goes crazy. Try to free download of the forthcoming Office 2016 suite for mac, I guess it will work OK. Alto, give a try to the last LibreOffice version, I think it also begins to handle CDMs.
In order to fully test what you wish, use a word processor which works, write a relevant list of words with as many CDMs as possible, then paste the text into Word 2011. If it fails to comply with the prerequisites, then it is anyway useless to go un trying your keylayout in Word 2011, as the result will be bad anyway.
You already have a quite long list of wp-s, which beautifully handle Old Greek (Nisus, Mellel, Pages – the new generation only, Word 2016, LibreOffice–the last version only etc.)
> On 22 Apr 2015, at 16:48, Timothy Fox <
timot...@gmail.com> wrote:
>
> <Graeca.keylayout>