I thought that too! I ended up taking a picture on my phone so I knew I wasn't imagining it!xxMine said 3+ when I took it 3 weeks and 6 days after BD'ing, so it's as accurate as it could be when it doesn't go past 3+ lol
I was more annoyed that the display died within 24hrs. I had wanted the + one, not digital, but I bought it online and they sent the digi ones instead. Supposed I shouldn't complain seeing as I got two digis for under £5 but it still annoyed me the Pregnant 3+ didn't last very long, I like to keep looking at it to make sure I didnt just imagine it lol.