We were having an issue where our Google analytics goals were not properly tracking through the reservations process on our vacation rental Escapia site…. For whatever reason I thought the Universal Google Analytics code was going to solve that problem… However it only solves the multiple subdomains problem. Modifications to your tracking code are required for proper cross domain tracking.… I just follow these instructions found here to solve it.

https://support.google.com/analytics/answer/1034342?hl=en