When you load a vox file into WavePad, it prompts you for the codec settings. If you want to have the orginal audio quality, you need to select the same codec settings that was used when recording the vox files.
We will take this into consideration in next future release. Perhaps you should use RecordPad Sound Recorder to record files. This program allows you to hide Restart button so you will not have this problem anymore. You can download it at nch.com.au/recordpad
The upper window displays the wave form of the audio file always in its full length - it is useful for knowing where you are in the file. The lower window shows the wave form of the audio based on the zoom level.They are not the left and right channels.