Complex sentence: They changed the classification of the ninth stage, moving Georget from the fourth place to the 48th and last place, which effectively costed him 44 points in the general classification, moving him from first to third place.
Split into simpler sentences: They changed the classification of the ninth stage, moving Georget from 4th on the stage to last (48th place). This effectively cost him 44 points in the general classification and moved him from first to third place.