My for loop isn't looping?

#include <file.au3>
#include <array.au3>

Dim $ArrayAllSources
_FileReadToArray("allsources.csv", $ArrayAllSources)
Dim $ArrayList
_FileReadToArray("list.txt", $ArrayList)

_ArrayDisplay($ArrayAllSources) ; array of about 1000 items, [0] contains the total amount of item
_ArrayDisplay($ArrayList) ; array of about 10 items, [0] contains the total items

For $i = 1 to $ArrayList[0] ; from 1 to 10, should loop 10 times

$ItemToSearch= $ArrayList[$i]

ConsoleWrite($ItemToSearch & @CRLF) ; correctly returns the item at line number

For $i = 1 to $ArrayAllSources[0]
$pos = StringInStr($ArrayAllSources[$i], $ItemToSearch )
if $pos > 0 then
ConsoleWrite($pos & @CRLF) ; corretly returns the line number where the first item was found
Else
EndIf
Next
; but then it never loops, just exits there!
Next