Okay I get it now. It is …\Bar2 because I typed in dev ..\Bar2 and it it is Bar1 v0.1.0 C:\Users\jakez.julia\dev\Bar1`` because I typed in 'dev \Users\jakez.julia\dev\Bar1`.
From the manual you referenced:
In addition to absolute paths, add and dev can accept relative paths to packages. In this case, the relative path from the active project to the package is stored. This approach is useful when the relative location of tracked dependencies is more important than their absolute location.