I am using CMS 1.7.3 and have noticed that deleted resolutions still appear in Layout’s Background form Moreover if the deleted resolution is selected as the layout resolution then layout will not play. Pls see images below:
I just tried to reproduce it, on our test CMS which is in version 1.7.4 this problem didn’t occur.
Could you please upgrade your CMS to 1.7.4 and confirm that it is indeed fixed?