wedouglas - 11:15 pm on Jan 31, 2009 (gmt 0)

I think that the main reason for allowing only one display url per adgroup is that you could fool their reviewers by setting keyword URL's that match one display URL, but not the other. I can only assume that they review per ad, not per adgroup.

I know I have accidentally left keywords active with keyword URL's that didn't match the new ad.

Also, a lot of people use 3rd party tracking. So reviewing keyword URL's would be a pain, finding that most are just instant redirects, i.e. linksynergy or whatever.