Why speedrunner in Ps2 and Ps3 was on the same ranking ?

idk, they can make category for PAL / NTSC for ps2 but you can filtring PS2

Because there isn't enough difference between PS2 and PS3 to warrant a board split. The only differences are that PS2 loses eight minutes to loads on NG+ No EGS, and PAL PS2's charge boots operate at 5/6th's the normal speed. They are not significant enough to split boards.

50000cal, In PS2 mine clipping is also harder. More like 15+ minutes slower than ps3.

It's how it's always been. Filtering the leaderboard is easy enough.