Because each satellite audits your node independently and they audits only data of their customers not the data of customers of another satellite.
Your logs should contains errors related to AP1 (use its SatelliteID 121RTSDpyNZVcEU84Ticf2L1ntiuUimbWgfATz21tuvgk3vzoA6 for search errors specifically related to this satellite). You need to search for GET_AUDIT or GET_REPAIR, both can affect the suspension score if there is any error during download a piece.
Since we increased a repair threshold, your node get more GET_REPAIR requests. And if it’s not able to process them in time - it will throw some errors, as result your suspension score will be affected.
When the piece is successfully downloaded, your suspension score is updated again. With high frequency it can jump down and up pretty fast, but updated on your node with a delay.