I looked at the rules and saw the wrong warp Glitch rule. Why is it allowed on 1.09 but not the current version? (1.10 I think?)

If we are talking just traditional wrong warping as seen in ch2 glitched runs, that's allowed regardless of 1.09. If you're talking about abusing saves to warp from invalid room to invalid room, then that is a 1.09 exclusive glitch that everyone kind of agreed to just be its own thing outside of current patch and survey program runs. (it leads to stuff like skipping the giga queen fight by just giving up lol)

save wrong warps and normal wrong warps are different things. normal wrong warps are performed by backing out of a screen transition frame perfectly while holding x/shift and c/ctrl, which then puts you at the default point of the room you're entering rather than the entrance you're coming from. you can perform them while you have wrong warp state (which you have after loading a save or after certain cutscenes like the one in trash zone), they are possible on every version of the game, and they are allowed in glitched and nmg categories.
save wrong warping is a 1.09-exclusive glitch where, as a result of a coding oversight, dying/reloading a save in certain rooms will teleport you forward 1 room, which can be used to do things like skip the hathy in field by loading the save in that room in chapter 1 or skip giga queen by dying to her in chapter 2. this is banned in the main glitched categories, and is only allowed in the 1.09 categories that are in misc. (and also on CE glitched categories but that's a different thing lol)