The Church of Alvis

I'm doing some work near spawn point station and it looks like certain chunks aren't updating. I place a block, but it disappears. I dig a hole, but the block remains. weirdness. Is something set to be unbuildable?

If my occupation forces are causing server problems I can withdraw some of my troops.

The area right around spawn has protection turned on so if you place a block or try to change anything it won't allow it. I can change that if need be, but there's some redstone stuff right under spawn that I want to keep intact.

I was just placing grass and torches on the surface to make it safe