I'm trying to authorise Google Analytics from within a sub-site (that has a mapped domain) but every time I try, Google asks to allow access to my primary domain (ThinkBiGSites.co.uk) rather than the sub-domain (TheOutsourcedFinanceDirector.com) and, as my primary domain's already got access, when I click to 'Allow' access, I simply get re-directed from the Google authorisation page to my primary home page, without being provided with an authorisation code.
This means I'm unable to select the appropriate analytics property in the sub-site as there isn't a drop down list of properties that are avaiable.
If I try to add the property analytics code manually, Google Analytics+ seems to ignore the code and simply continue to use the primary code for the network and show site data based on that.
This used to work without any issue and I have other domains that are still showing their own analytics code and data within the sub-site dashboard. However, I can't seem to get authorisation for this particular sub-site - and I believe I've had this issue before but didn't raise a ticket at the time.
For some time, now, I've been having problems with your Domain Mapping plugin and I can't help but think that the two issues may be connected because the Domain Mapping issues have included sites being accessible via both the mapped domain and the original domain, despite the fact that I've set it to only allow the mapped domain.
This has never been fixed - I just found a work around (I use the native WordPress Domain Mapping to change the url of the sub-site in the settings).
I may be wrong but this just 'feels' like it's connected.