AudioLabel is designed to print on one-side of the label paper, which means that a folded Front Cover will have 2 blank panels inside. Printing on all 4 panels of a folded Front Cover requires duplex printing (or printing on both sides of the label paper). You can still create a duplex folded Front Cover (with 4 panel printing), but you will need to create a separate AudioLabel project with the opposite side of the folded Front cover.
The average consumer printer does not support automatic duplex printing, so it's usually necessary to print on one side of the paper, flip the paper, re-load the printer tray, and print on the opposite side. It's very important that the paper is flipped and inserted into the printer tray correctly for the second printing pass.
Printing on one side of a folded Front Cover leaves the inside blank, but creates a "Duplex" effect when the cover is folded. We also noticed that a folded Front Cover stays in the jewel case better than a single-layer square Front Cover.
Hope that helps. Please let me know if you have any other questions.