It’s just floating point precision I assume. To be honest I’m surprised the X coordinate matches perfectly, with all the math it goes through.
Are you trying to compare them to see if they’re equal? If so, you’ll have to compare each coordinate yourself and account for some imprecision somehow. You could either round the numbers first, or do something like: "if (x1 - x2) < 0.001 " - then they are the same.