Complex sentence: This year, the "Signpost" has counted sets promoted at FPC as multiple promotions, owing to a change in the counting method; so the total amount of featured content promoted this year is not directly comparable to that promoted last year.
Split into simpler sentences: This year, the "Signpost" has counted sets promoted at FPC as multiple promotions, owing to a change in the counting method. As such, the total amount of featured content promoted this year is not directly comparable to that promoted last year.