[denverpete]

It sounds like you are describing two different problems - but your post isn't entirely clear.

Does it tend to "flash twice" and then immediately beep at you? If so, the car is telling you that you have something "open". This is usually the center console box. Make sure it's secure and then try it again.

If after everything is properly closed it still beeps at you (after hitting remote) - then I'd guess that one of the sensors isn't operating properly and is reading "open" when it's actually "closed".

If it randomly beeps at you hours after you've locked it (without using the remote) - then I'm at a loss.