At level 5, the additional feat of two weapon fighting is NOT given. No additional feat at all, from what I see on level up.
It is probably given but not listed (sadly). In the future, I would suggest that LETO be used or something to actually give these feats from the perks so that things that other feats which require it can be taken and such.
Rest. Go to another area. Relog. Wait for a reset. Report back.