It makes sense for you to have a written agreement that the agent represents you and is not acting on behalf of the seller. The TAR form is common, but not sacrosanct. The terms of representation should be fair to both you and the agent. If you are serious about the home, don't get sidetracked. Have a phone or face to face conversation with the agent about your concerns with the employment agreement and get that out of the way. Then you can focus on getting the home that you want.