This is a little, odd because he did load them one at a time. The first engine load took and address. That address should not have been available when he tried to load the second engine 1 hr later.
When you load the engines look at what address they have. If infact the same I can't explain why one address is being used by both based on how you loaded, but with only one on the track try to change it's address to a different location, then put other on track and see what happens. G
Need model number to discuss your lighting issues.G
