I have a Pioneer SX-5 receiver that used to be belong to my daughter. It works great, but I don't understand how to use the presets. I put new batteries in, and they all go to 87.5 on FM. How do I get 88.5 to be the first preset, for example? I assumed it was like my car radio - hold the preset for five seconds. Not so. As soon as I hit the preset button, the station goes to 87.5. The manual isn't clear either.