They are not quite the same.  The 2nd one requires metal to recruit.  Note the different stats on the two.

    However, the stats do seem odd on the second one (Combat rating is 11 as opposed to 10, 

    but Hit Points are way lower on the one needing metal).  

    So something does seem amiss.

This is an old bug from beta 4 (I think). Despite this they have not prioritized it enough to fix this. I would assume you "just" needed to remove some XML-code, but maybe it is more diffilcult than that.