Sections in INI files are ignored if they have non-alphanumeric characters or don't end in ]. Not sure if this is a bug, i couldn't find any syntax standard for the sections beyond that they begin with [, so i'm presuming anything including symbols should be allowed between [...] and maybe even allow omission of the final ], i certainly wouldn't see any harm in this looseness - this could also be a SourceCookifier limitation, but i'm checking here first as the most likely source of the problem.
SourceCookifier 0.5.3 (which uses Exuberant CTags) in Notepad++ 5.7 UNICODE on XP SP3
EXAMPLE (has a non-alphanumeric hyphen and so this section isn't listed):-
[SECTION - A]