That can't be right, semis are one-off games only this season - unless OFC has changed their minds very, very recently.
I do remember seeing in the program the one off semi but google the above - But as you say it souds wrong
Quote OFC press release:
"Looking further into the competition the draw has also determined that the winner of the quarter final between Hienghene Sport and Ba FC will host the first semi-final against the winner of the contest between Team Wellington and Henderson Eels.
Meanhile, the second semi-final will be staged either in Tahiti or New Caledonia with the winner of the match between AS Central Sport and AS Magenta hosting the winner of the Auckland City versus Lae City FC clash.
The final will also be a one off contest hosted by the winner of the second semi-final in the middle of May."