Canon 5D iii issues.

Hi all,

I got my 5D iii when pretty much when they first came into Aus..I was super impressed with the image quality and construction. However i have had a few issues develop over the past few months. The first was an appearance of a red light flare looking area on some night scene images, shooting different angles of the same scene it was repeating in the same spot.. bottom, slightly left. The second has only happened in the past few weeks, i have been shooting landscapes at varying iso, F and shutters and seem to be getting a high rate of blurred/ unfocused images. I was wondering if anyone has had the same issues. It seems strange as when i first got the camera every image was razor sharp. Im still using the same two lenses: canon 24-105 L and Canon 70-200 L.

Any help or suggestions would be greatly appreciated.

ISO 4000
F4
24mm
58 sec