Problems with Slide Masters

Here's a trick I used to find which slides are using which layout.  Go to the Slide Master tab and create a blue rectangle for example and put it on the Master layout for the Themetabs layout and do the same for your other layout (Clean); make it an orange one. Then go into story view and you can get a quick look at which layouts are being used on which slides. If you have a quiz bank, you can also see what layout is applied there. Hope this helps you.

Richard