DOM has the ability to merge financial default dimensions when updating a site on sales lines via a parameter in DOM Parameters. However, this only performs a merge dimensions. So, if the sales line already had a cost center and department from the original site, since the cost center is the only dimension on the site, the cost center will be updated but not the department. This conflicts with what happens when you manually change the site on the sales line via the form as that will perform a change dimensions function and overwrite the department financial dimension.

It would be ideal to have either option to merge or change dimensions when DOM updates the site.