After selecting site(s) to delete and clicking delete, you are given a warning about deleting sites. This warning does not match the style of many other Sakai warning and lacks the "Alert!" that most messages start with.
After selecting two or more sites to edit, Sakai gives you the slightly oddly worded warning:
Alert: Please check only one site to Edit... at a time
Perhaps this could be reworded "Please select only one site at a time for editing." or the even simpler, "Please select only one site for editing."