Hello there. Please note that the metro services between 小梅沙 and 赤湾 (https://www.openstreetmap.org/relation/13176925 ; https://www.openstreetmap.org/relation/13176926)  is considered as both Line 2 and 8. Technically, Line 2 and 8 separate at 莲塘 (https://www.openstreetmap.org/node/6673778672). But in the actual operation, the trains go across the whole Line 2 and 8 in one service without terminating at 莲塘. Also, according to the direction board of the station, eastbound services (https://www.openstreetmap.org/relation/13176926) are marked as Line 8 while westbound services (https://www.openstreetmap.org/relation/13176925) are marked as Line 2.