Hello Mr. Brett. Thanks for taking the time to respond.
1. I have two domains I am marketing for in adwords. Both are the same type of business but different locations. One is well known and the other is not. The one that is well known I am doing the remarketing for. I also do some social marketing for that location, but nothing else. The lesser known location i have a pretty serious adwords campaign running with good results.
2. The only remarketing I am doing is adwords\search.
3. I am using google tag manager on the site, but still unable to get cross domain working. On my site (domain1.com), its a simple widget (domain2.com) that opens up and completes the transaction then pushes them to a thank-you page (back to domain1.com). I track all the thank-you landings, but they all show they are coming from domain2.com.
4. I am no way an expert, but I am pretty familiar with many of the technologies being deployed.
Thanks again for any help you may offer!
Doug