Daytonaguy,
Get used to it. Oscars have lots of different personalities. Mine are like yours, very shy. I've had mine for two years now and they still do that on occasion. When I first got them I thought there was something wrong also. The would never come out while I was around, they would hide when I walked into the room, etc.
At feeding time, I have to shake the food bag in front of the tank. They wag themselves like puppies. If I don't shake the food bag before feeding time, they sulk and won't eat while I'm there.
When I clean the tank - BOOM - into the corner they go. Last time I did a major clean, they sulked for 3 or 4 days. S/He'll come around...... eventually. Remember, when you own Oscars - It's their world we just live in it.
Deltonaguy