FM Radio Station Won't Change

Still have problem with a replacement unit. I notice that when it happens you can’t press and hold the forward to the next radio station and have it look for the next station. It just steps one frequence step at a time until you release the forward button. 

It would be really nice if someone would reproduce this problem. I’m confident that it must be a software problem, otherwise why would a new unit still fail. 

It is easy to reproduce, but you need to spend 30 minutes to do this. 

Reset the device.

Set up some presets.

Listen to the radio.

When a song comes on you don’t like, skip to next preset until you find a song you like.

Listen for a while, then when a song comes on you don’t like, switch stations.

Do this for a while and you will notice the station won’t skip to the next preset. The display DOES change, but what you listen to isn’t changing. 

How do I fix this? ANYONE at Sansa listening?! I’m really frustrated with this.