Ordering data in hash of hashes

Hello,

I have this piece of code :

...
#Get GPOs with all settings disabled
    $GpoList |
        Where-Object {$_.gpostatus -eq "allsettingsdisabled"} |
            ForEach-Object{
                $CandidateGPOs[$_.id] = 
                    @{
                        ID                    = $_.id
                        DisplayName           = $_.displayname
                        CreationTime          = $_.creationtime
                        Modificationtime      = $_.modificationtime
                        Owner                 = $_.Owner
                        Domain                = $domain
                        All_Settings_Disabled = $CandidateGPOs[$_.id].All_Settings_Disabled +"True"
                        Not_linked            = $CandidateGPOs[$_.id].Not_linked +""
                        Links_disabled        = $CandidateGPOs[$_.id].Links_disabled +""
                        No_settings           = $CandidateGPOs[$_.id].No_settings +""
                     } 
}
... 
#other similar loops checking other settings (not linked, links disabled, no settings).
    
$candidateGPOs.GetEnumerator() | Sort-Object $_.keys | ForEach-Object{[PSCustomObject]$_.value } | Export-Csv "$ReportPath\_candidateGPOs_Listing.csv" -NoTypeInformation -Append -delimiter ";"

The result is not in the same order in the CSV.
The command give this order : $candidateGPOs.GetEnumerator() | Sort-Object $_.keys | ForEach-Object{[PSCustomObject]$_.value } =>
Modificationtime : 13.06.2019 11:24:02
ID : b17dfccad9c-a93c0-41a9-8d04-e119a549450f
CreationTime : 24.03.2007 14:27:45
No_settings : True
Domain : contoso.comt
Not_linked :
Owner : contoso\Domain Admins
All_Settings_Disabled :
Links_disabled :
DisplayName : Default Domain Controllers Policy

It was working before. I don't understand what I wrongly changed...

Thank you

O