Time confusion

I really enjoy this collection, but in some of the stories I have been confused on the time setting. For example, in "Singing My Sister Down", there is still this primitive death sentence and tribal lifestyle, but the mother was able to get a gun/silencer, (I think Stacey already commented on this) which are two things that I associate with different eras. Also, in "Cold Fires" the story the husband tells and where there are now seem to have a great time difference between them.

Did anyone else feel this way? Did you see any other examples of this??

See you in class tonight!