There are 46 starts at Longchamp over 4 full courses and a short straight course. You have 17 listed on the spreadsheet. There are no "furlong" distances, everything uses a metric metre basis. 2000m = 9.94 furlongs.
You cannot rely on RP as they do not know from the results which one of the 4 courses are being used for any particular race. There are only distances in exact multiples of 50m, but many distances are exactly repeated on the other courses, presumably to save wear and tear. So the "9f" is exactly 1850m and always is 1850m from that particular course’s start position.