I have a little workaround for it now.
Using harvard-bibstyle I want to achieve an inline citation “(author, year:page)” I do this by typing
[acp author="surname" year="2012" id="surname-1"] ({author},{year}:<page>) [/acp]
and at the bottom of the text i overwrite this id with a complete
[acp add …… id="surname-1" /]
so the bibliography is setup with all relevant data.
greets