The penalty came from a corner.
Obviously it's not ideal to miss chances but if set-pieces are creating easy chances (which they clearly are, whether penalties or sitters) then evidently there is nothing wrong with our attacking set pieces. As for our defending of set pieces, this has improved since we signed Trottman.
Set pieces are not a weakness for us.
Give it two or three weeks and you will start to see how much better we are than most of the teams in this division.