The orange is from your camera being on white balance for sunlight, but you are inside so the lighting is actually tungsten bulbs. If you had florescent lights, the pictures would be green.
the Truman-has-no-head pictures - you're likely too close for your camera's focus so it is pausing a long time to try and figure out the picture.
In the church - the camera focused and metered for the pews, you can see the flash reflection on the wood. It didn't focus on the person or it probably would have been lighter. Even so, it's doubtful the flash would have made it that far in that dark of a church.
The motion blur on the wedding party - to low of shutter speed most likely.
The rest... well... sorry, can't really help you.