Fighting Initiate Feat Bug?

When I select the Fighting Initiate Feat I don't seem to be getting either the Grim Hollow or DnD Beyond Drops fighting style options despite owning them, only having the core options.

Doing a 1 lvl dip into Fighter they appear to be options at level 1. Are they meant to be options with the feat as well?

Fighting Initiate is a feat from the 5e rules, so it only includes the 5e fighting style class feature options, not the 5.5e fighting style feats. 

If your DM allows you to use Fighting Initiate under the 5.5e rules, you can just turn off feat prerequisites and take the fighting style feat that you want directly instead.