I saw engines moving today

Today was a good day. It started out by cutting the gaps that I missed during installation of everything else.
I disconnected all power to all of the power districts but one. I then went to the end of the layout and started cleaning everything off of the track and vacuuming to ensure that anything that could be shorting the track was found. I turned on the power and discovered a short. After a little troubleshooting I found out that it was in the block where the staging ladder to the main line was. I did a quick check and couldn't find anything obvious and I could clear it up by pulling the occupancy detector and leave it off. I decided to go check all of power districts and then see what fixes were needed.
I had the same problem at the staging ladder at the other end of the layout. I guess whatever I did at the ladder I did twice. There are 60 separate blocks on the layout and only two were bad. I'm thinking that was a pretty successful day. Tomorrow I'll try to figure out what the problem in those two sections are..