Last night I was having some problems with my 3DS's Streetpass. Here's what happened:
I was at Target at midnight for the Black Friday sales. I had gotten a tag when I was in line outside, but there was only a new arrival for Super Mario 3D Land, and not the Mii Plaza. I went to the Mii Plaza, and no new arrivals where there. Later, when i was in the store, I had tagged with someone who I had tagged with before. he came to my Plaze gate, and it said he had been playing Super Mario 3D Land. I then went to Super Mario 3D Land to see what I got, and the two Mystery Boxes where from two strangers. The person who actually MADE IT to my Plaza wasn't appearing on the game at all (although I am aware that he could've not had Streetpass enabled for the game). Can someone please tell me how this problem could've been caused, and how I can possibly avoid it in the future?
BTW, this isn't the first time Streetpass has acted like junk for me. One time, I was at my neighbor's house, and when we tagged, data only showed up on his 3DS.