[Tinymux] Reality Levels Question

[Golden Age]

I've read through the documentation for reality levels, and thought that 
I understood it, but it's not working the way I thought it should and 
i'm not sure if it's just me misunderstanding or if there is something 
not right with it.
Running version MUX 2.4.0.22
Relavent entries in the config file
reality_level Real 1
reality_level Staff 1048576
reality_level All 4294967295

Staff player => RxLevel: Real Staff & TxLevel: Real.
Non-staff player => RxLevel: Real & TxLevel: Real.
Exit => RxLevel: Staff & TxLevel: Staff
cansee(staff player,exit) returns 1
cansee(non-staff player,exit) returns 0
When looking in the source room the staff player can see the exit and go 
through it, which is as I expected. But the problem is that the 
non-staff player can also see the exit (although not use it).
Is this the correct behaviour?