To cite from the doc: Similarly named symbols of different contexts are ignored. This does obviously not mean that equaly named symbols are ignored
I am having some troubles with a class called "iterator". VAX seems to match only the name but not the parent of a symbol, thus the "context" is ignored. To verify, create 2 classes (or more) which contain a class called "iterator" (or whaever you'd like to call it) and do a Rename/Find References on one of them. VAX will find the symbol of both classes. Guess iterator is a common enough symbol so that people sooner or later will run into troubles with that.