[Kireyo]

1) you could try the UV map tool, but since you changed the mesh, it won't revert back to the original mapping. Again I suggest you just start again, this time using the SL sample sphere as a starting point.

2) I'm afraid I don't have the answer to this one either, but I recognize the problem (see pic). If all else fails you could make it phantom and add invisible prims to be able to sit in your pool.