End Gateways not following set mechanics

some of my end gateways have generated over the void right next to the edge of the main end island, and I think it is messing up the way you return through them.

when I come back to the main island through a gateway, I am not teleported in the area that I am supposed to be. On the Minecraft wiki it said that there was an 11 x 11 block perimeter around the portal that I could teleport to, but it sends me to the edge of the island like 50 blocks away. I tried to make it teleport me closer to the actual gateway, but it just kept putting me super far away. Eventually, I removed enough blocks around the area it was sending me to, and instead of generating a small island for me to go to within the 11 x 11 block perimeter, it generated one over 20 blocks away, and refuses to follow the mechanics that all the other gateways I have ever used have followed. A few times, it has even sent me over the void, where I had to fly away with my elytra, so it didn’t even bother to detect solid blocks that I could land on. It just threw me over the void.