the time line was already messed up before not even sure how the events/ages match up but this by far take sthe cake:
http://www.narutobase.net/manga/Naruto/604/3 farest to the right

clearly that is iruka only other option is shikaku but he hasn't have a slash across his nose if he was there with obito in the ninja adcendemy then how was he younger then 12 during the nine tails invasion he would have to be around 12 to still be in the aceemey and as we see most of obitos generations got out around 6 by the nine tails attack iruka is still a child in the acdemy. obito is 15/14 during the invasion no way would iruka still be in the academy/young enough to cry /act stupid like naruto did over his aprents being gone.