Just random chance. Last year was 1-5-14-20-24-26-27-63. The year before was 2-7-12-20-27-40-51-64.
Looking at this year's seeds, I hypothesized that the remaining seeds reflected on the understandable lack of depth compared to the men's fields—that even amongst the 64 who made match play, there was still a significant gap in ability between high and low seeds (and I still think that's the case). But considering the two previous years as well, it mostly seems to show that a lot can happen in 18 holes of match play!