Hey, at least you’re spelling everything correctly, so you’re already above average for internet users.
I’d just try formatting it and updating the firmware. There are stickied threads that discuss firmware; for formatting, just find the Format option under Settings.
I’ve noticed that when using Windows Media Player to sync songs onto the Express, some file formats are converted before they are sync-ed. Some songs that are not in standard format will first show a “Converting” progress bar, and then the “Synchronizing” progress bar (see image below: the first file needed to be converted, the second file didn’t). Sometimes this conversion causes the speed of the song to change (shorter song length & higher pitch tones).
However, when this has happened to me, the whole song comes out the wrong speed, not sections of it. So I don’t know if this applies to your situation.
For me, I just got a new version of the same song that was a standard format, and replaced it so it didn’t need to do any conversions.