As far as the electric seats are concerned, I believe that is normal. I can adjust my seating position with the car off. Some others may want to chime in here.

The alarm is a different story altogether, if you search for alarm problems there is a heap of information on the forum.

However, I am going through the same dilemma at the moment and to help you get started the most common causes of alarm faults are:

1.Flat Car Battery.
2.Flat Key FOB Batteries.
3.Dodgy Alarm Control Modules.

I have tested and replaced the first two on the list, but that hasn't helped me personally, but for others it has done the trick. Unfortunately, I haven't had time to bring the car in to get the control modules checked :| hopefully that will fix the problem for good.

It's worth knowing you can shut the alarm up by removing the # 9 fuse, however you will not be able to lock the car remotely and you will have no interior light.

Hope this helps.

Cheers,

Michael