Daten werden falsch aus csv-Datei in Powershell importiert

clear
$table = Import-Csv -Path 'C:\Temp\Stempelungen\StempelungenJira.csv' -Delimiter ";"  
$counter = 0
$tablelength = $table.count


While ($counter -lt $tablelength) {

$parts = $table[$counter] -split ';'  
$name = $parts[4]
$prename = $parts[5]
$date = $parts[6]
$time = $parts[7] 

$parts2 = $table[$counter + 1] -split ';'  
$name2 = $parts2[4]
$prename2 = $parts2[5]
$date2 = $parts2[6]
$time2 = $parts2[7]

$calc = $time2 - $time

 if ($name -eq $name2 -and $prename -eq $prename2 -and $date -eq $date2) {
  write-host $name;$prename;$date;$calc;$counter
 }
 else{
 write-host falsch $counter

 $counter = $counter - 1

 }
$counter = $counter + 2
}

x;x;x;x;Name;Vorname;Datum;Zeit;x;x;x;x;x
x;x;x;x;Walker;John;13.01.;08:00;x;x;x;x;x
x;x;x;x;Walker;John;13.01.;11:00;x;x;x;x;x
x;x;x;x;Walker;John;13.01.;12:00;x;x;x;x;x
x;x;x;x;Walker;John;13.01.;17:00;x;x;x;x;x
x;x;x;x;Walker;John;14.01.;07:00;x;x;x;x;x
x;x;x;x;Walker;John;14.01.;12:00;x;x;x;x;x
x;x;x;x;Walker;John;14.01.;12:30;x;x;x;x;x
x;x;x;x;Walker;John;14.01.;16:00;x;x;x;x;x