Parshas Mishpatim:One Parsha or Two?

I happened to see an interesting footnote in the MAchon Yerushalayim edition of the Minchas Chinuch. The Chinuch splits Parshas Mishpatim into two sections. Teh first section is from the beginning until the mitzvah of "kesef talveh" and the second section is from this mitzvah until the end. The footnote explains that in certain communities they were makpid to read Parshas Tazria before Pesach. In a leap year there are 29 weeks from Beraishis until Pesach but only 28 parshiyos. In these communities they split Mishpatim into two parts to make up for the extra week. According to the footnote, this is currently done in Algiera and Tunisia.