in short
when you create x1, x2, x3
pubkey will be break in raw, and back to reconstruct, and you will get proper series of x1, x2, x3
above my pubkey proper x1, x2, x3 is here
x1 = a673e97568057fb5f41c35d6ed6c88ef97510d71222b3686ef892f4ccc2af536
x2 = 991eb8eb2e45b4bc9c71bc9a022832e712a8dc1b2db62bd7456e49b2d9f7dac8
x3 = c06d5d9f69b4cb8d6f720d8f106b442956061673b01e9da1cb0886fe59dd2860

mean that is x2
what you want is important what is correct location of x1, x2, x3
if you calc wrong, you will never reach at your target