On the scoreboard at least...
Pablo Hernandez can this weekend claim to be the only footballer ever to be in three places at once. He had quite the weekend! According to news outlets who can't be bothered to do research he scored a wondergoal for Celta Vigo (a goal in fact scored by Chilean namesake Pablo Hernandez) on Saturday, played for Qatari side Al-Arabi on Friday and still had time to make the bench for the Swans on Saturday afternoon!
Now, you could perhaps understand that kind of oversight. I mean, the big screens are new and there's undoubtedly going to be teething problems. That being said you'd think someone would have noticed the error before Marvin Emnes (the player who was mistakenly excluded from the substitutes list) was brought on for Ki Sung-Yueng. Again the substitute image showed Pablo coming on for Ki. What's more, I'm pretty sure the announcer announced Emnes as Bafetimbi Gomis. Cough.
I'm sure someone took some stick in the control room for these things after they realised their mistake. I doubt it'll happen again!