I can reproduce it pretty easily. For example:
* bzr init branch1
* cd branch
* echo test > test1.txt
* echo test > test2.txt
* bzr add test1.txt
* bzr commit -m "test" test1.txt
* bzr explorer .
If you select "Versioned" then the working tree shows both test1.txt and test2.txt. The status shows up as "non-versioned" for test2.txt. This file also comes up if you select "Ignored".
I can reproduce it pretty easily. For example:
* bzr init branch1
* cd branch
* echo test > test1.txt
* echo test > test2.txt
* bzr add test1.txt
* bzr commit -m "test" test1.txt
* bzr explorer .
If you select "Versioned" then the working tree shows both test1.txt and test2.txt. The status shows up as "non-versioned" for test2.txt. This file also comes up if you select "Ignored".