It's not uncommon for hair on one head to be a few different types. I'm not that great at deciding exactly what the types are, its just curly to me.

Sometimes its possible for the weight of your hair to pull on your hair and loosen the curl as it gets longer as well.

Last thing, check out the newbie section so you can learn about hair texture and porosity, etc. Those are the things you really want to figure out.
Very basic hair wiki
In depth wikis

2b/3a medium/coarse semi-porous/iii
White Rain Ocean Mist GVP conditioning balm. Bioterra/LA Looks. Air dry. SOTC w/LOOB..I think its my first HG.
Experimenting with homemade recipes.