09-06-2013, 02:38 PM
All good ideas that you've tried, usually some of them would work. Perhaps if at some point you X'd out some slots and then saved, then those slots got somehow lost.
In any case, you are right, the only way to actually add or remove slots is by using the +/- buttons on the Layout tab. Usually what I suggest in this situation, is to use the - button and remove all of the slots down to the ones that you can see when you Visualize. So if you can only see 4 slots, then remove down to 4 slots. Then, start adding the slots back in with the + button.
In any case, you are right, the only way to actually add or remove slots is by using the +/- buttons on the Layout tab. Usually what I suggest in this situation, is to use the - button and remove all of the slots down to the ones that you can see when you Visualize. So if you can only see 4 slots, then remove down to 4 slots. Then, start adding the slots back in with the + button.