First goal in match is confusing. The total number of such goals in the post is 8, but I can count 7 (Newcastle, Man United and Spurs scored 1st) in the League out of 10 games and 10/11 overall (7 in the League + Salzburg, Genk and MK Dons; Arsenal one was own goal if you want to include that as well) in 14 games.
EDIT: Are we not including the own goals against Norwich and Burnley (and thereby Arsenal as well)?