If you use Custom Actions mod and you accidentally use thatch roof continue (20004) to plan and build a building floor, it will build in 5 actions as invisible and won’t be able to be removed unless you use 180 (destroy) on the tile. This may occur with other build types, I didn’t test it.

When you can’t move from crate to container on a deed, but can if to inventory and to container:

Forum: This happens when the deed disallows the drop permission for non-citizens.

Also, you can’t move crates out of a crate rack while it is in a vehicle.  Attempts to do so will create ghosts on the ground, which are still in the crate rack.

Always move the crates to vehicle inventory before unloading them.  You can move crates from crate rack to crate rack directly from a vehicle to one that is outside the vehicle.

How to fix the ghost crates:  You can unload/reload the ghosts and it resets their status, but they pop back onto the ground again.  The best fix is to unload them properly and then load them back in to clear the status of the crates.

To move a guard tower, pick it up and drop it.  If the guards are bugged (dupes, or won’t spawn), copy the tower and drop the new one and destroy the old one.