Automatic gearbox fault

When you turn the ignition on the instrument cluster registers that more than one gear is selected,I.e park,reverse,drive or even neutral,drive,1or2. It pleases it self day by day but because of it, it sometimes will not start and you have to put it into neutral. But now it has started were sometimes you can not even get it into neutral and you have to press the release switch to get it out of park. It has also been noted that when you do get it started and you are driving it forward the reverse light comes on and as been know to be on when you are in park, so now I have had to take the bulb out. Has anyone got any ideas or have come across this problem before?