[ic] Foundation Categories - 2 entries for every category - why?

[interchange-users@interchange.redhat.com (Dog Tags)]

Hi All

In Foundation, there are 2 entries for every category in the cat table:

00027 16 Breathing Protection   05 name         simple         category=Breathing Protection
00002 8 Breathing Protection   05 name         simple         category=Breathing Protection

Does anyone know why? 

Are they necessary?

Thanks very much.
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