How to add an element back into an array - arrays

Question

First off, I am new to Powershell, so please excuse any poor coding here.
I'm trying to write a script that queues commands. We have a piece of equipment that can only handle 32 commands at one time. What I want to do is build a command file that has many more than 32 commands and then it automatically queues any command after 32 until another free slot opens up. Everything seems to be working except when I go into my 'else' statement. I attempt to add the current $_ back into the array so it doesn't get lost and gets reprocessed, but this does not seem to be working.
I build my array from a text file:
$commands = #(Get-Content C:\scripts\temp\commands.txt)
When I try to add the current $_ value back into the array during the 'else' pause statement, it never adds back in, so that one particular command never enters back into the array. So if my script has to pause 15 times, 15 commands will never get ran as they just get processed by the 'else' statement and get thrown out of my 'if/else' loop.
Here's my if/else loop:
$commands | ForEach-Object {
If (Test-Path C:\scripts\temp\active_migrations.txt){
Remove-Item C:\scripts\temp\active_migrations.txt
}
CMD.EXE /C "ssh $user#$cluster -pw $PlainPassword lsmigrate" > C:\scripts\temp\active_migrations.txt
$count = Get-Content C:\scripts\temp\active_migrations.txt
$number_of_migrations = $count.Length / 6
IF ($number_of_migrations -lt 32)
{
Write-Host "Migrations are currently at $number_of_migrations. Proceeding with next vdisk migration."
Write-Host "Issuing command $_"
Write-Host "There are still $migrations_left migrations to execute of $total_migrations total."
Write-Host ""
CMD.EXE /C "ssh $user#$cluster -pw $PlainPassword $_"
SLEEP 2
$migrations_left--
}
ELSE
{
Write-Host "Migrations are currently at $number_of_migrations. Sleeping for 1 minute"
$commands = #($commands + $_)
Write-Host "There are still $migrations_left migrations to execute of $total_migrations total."
SLEEP 60
}}
}
Any help is much appreciated.

Answer 1

Thank you Paul. I ended up dumping things during the else statement to a temp array and it works! Appreciate the assistance.
function commands_temp
{
if (Test-Path C:\scripts\temp\commands_temp.txt)
{
$commands=#()
$commands=#(Get-Content C:\scripts\temp\commands_temp.txt)
Remove-Item C:\scripts\temp\commands_temp.txt
Proceed
}
Else
{
Write-Host "All migrations are either complete or successfully executed. Check the GUI or run lsmigrate CLI command for full status."