I have a subsite where I have owner permissions: I can create and run workflows, can create new forms, but I cannot modify them! Even the just created forms appear highlighted in yellow and "advanced mode" icon disabled.
I can guess there is a problem with permissions, but unfortunately, I have no access (with owner permission) at site collection level.
I have been checking on any list and/or library in the site and always have the same issue. In other sites I can do anything with forms - so it is not a SPD issue.
Some idea where to check?