We have just come across a rather potential dangerous annotation problem.

Situation:
We have 2 topo's. One is on the Existing phase which has been demolished in Stage 1, and the second is on the Stage 1 phase (the next phase after Existing).
The view is set up to display both Existing/Demolished objects and the current works, being Stage 1.

Problem:
When a spot level is added, it seems to be referencing/connecting to the topo which has the topmost surface at the spot level's location. So you could be putting a spot level on the demolished topo or the current.

I think that this is quite dangerous, and would like to see spot levels attach to the current phase objects only. We could also have an override should you need to reference other phased objects.

The only way around this is to change the view's phase filter before adding the spot levels and then changing the phase filter back after.