Strange Problem and I need some help.

My photos are having problems and I posted some example hoping that I can
find out what is the problem. Please note that this is my first camera and
I have been doing this for about a week. I'm just trying to work out the
kinks in my camera design.

This photo was a 2-min exposure on a very overcast sky about 20 min before
sunset. I just wanted to see how a long exposure would turn out. Can you
see the two vertical lines down the middle of the photo? What could cause
that?
http://www.pinholevisions.org/discussion/upload/gallery2002.php?cmd=max&star
t=&pic=trfarm_lines.jpg

The photo below was the same shot but was a 1 min and 30 second exposure and
now I have a strange light source coming from the bottom. Could it be cause
by a problem with my pinhole? I sure I don't have any light leaks. I'm
using an oatmeal pinhole camera.
http://www.pinholevisions.org/discussion/upload/gallery2002.php?cmd=max&star
t=&pic=trfarm_lightproblem.jpg
Received on Tue Aug 13 10:48:33 2002