When you experiment with your WordPress blog user rights (editing it directly or with use of User Role Editor plugin) you need to thoroughly test your modifications.
In case you create a new roles or edit existing WordPress core roles, you need to make tests with double zeal. What does it mean? It means that you should to log off as blog administrator, login as other user assigned another role and check what such user really can do. If you see that some staff needs to be corrected, you should log off and login as WordPress administrator again. You have to repeat those same simple steps again, again and again. Every login operation needs user name and password manual input. We wasted a lot of time for such operations.
Have you the same feelings? If such, you are in the right place. There is a User Switching WordPress plugin which is made by its author John Blackbourn to save a lot of time for us. After a week of use I’m sure that “User Switching” plugin is a valuable addition to your test WordPress installation where you play with changed WordPress user roles and capabilities sets.