heading

When I plan on skyvector this sample New Jersey flight { KMMU (Morristown) 12N (Aeroflex-Andover) 1N7 (Blairstown) N05 (Hackettstown) N51 (Solberg) KMMU }, I get different headings than when I make the same plan in Foreflight. Skyvector: KMMU (324) 12N (272) 1N7 (157) N05 (171) N51 (058) KMMU...