That's not indicative of a kata issue, since it doesn't take spelling into account. If you think a test case is wrong then keep in mind that it only makes sense to talk about wrong answer if you include the test input.

I think there's an issue with the final fixed tests for PowerShell. I'm not doing any manipulation on character order yet some have either the test case or the value passed in as $st that are misspelled.

[2] Expected strings to be the same, but they were different.
String lengths are both 7.
Strings differ at index 4.
Expected: 'Willaim'
But was:  'William'
           ----^
[3] Expected strings to be the same, but they were different.
String lengths are both 6.
Strings differ at index 4.
Expected: 'Olivia'
But was:  'Olivai'
           ----^