PS Object Behaivour

I am new to powershell

Using  a power shell script to deploy my SSRS reports

I have run into weird problem 

extracts from script 

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Create Data source function

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function New-SSRSDataSource ($Proxy,[string]$RdsPath,[string]$Folder,[switch]$Overwrite) {

    Write-Verbose "New-SSRSDataSource -RdsPath $RdsPath -Folder $Folder"

    $Folder = Normalize-SSRSFolder -Folder $Folder

    [xml]$Rds = Get-Content -Path $RdsPath

    $ConnProps = $Rds.RptDataSource.ConnectionProperties

    $Definition = New-Object -TypeName SSRS.ReportingService2010.DataSourceDefinition

    $Definition.ConnectString = $ConnProps.ConnectString

    $Definition.Extension = $ConnProps.Extension 

    if ([Convert]::ToBoolean($ConnProps.IntegratedSecurity)) {

        $Definition.CredentialRetrieval = 'Integrated'

    }

        $hash =@{

        Name = $Rds.RptDataSource.Name

        Path =  $Folder + '/' + $Rds.RptDataSource.Name

    }

    $DataSource = New-Object -TypeName PSCustomObject -Property $hash

    if ( $Overwrite -or  $Proxy.GetItemType($DataSource.Path) -eq 'Unknown') {

        $Proxy.CreateDataSource($DataSource.Name, $Folder, $Overwrite, $Definition, $null)

    }

    return $DataSource

}

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where Its referenced

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$DataSourcePaths = @{}

$Project.SelectNodes('Project/DataSources/ProjectItem') |

    ForEach-Object {

   $RdsPath = $ProjectRoot | Join-Path -ChildPath $_.FullPath

        "$RdsPath"

$DataSource = New-SSRSDataSource -Proxy $Proxy -RdsPath $RdsPath -Folder $DataSourceFolder 

$DataSource|Out-GridView

       $DataSourcePaths.Add($DataSource.Name,$DataSource.Path)

    }

I have two Items in 'ProjectItem' node so essentially for loop should  execute for two times

current behaivour

   when I execute script for the first time

following are results from both grid view and error message at powershell prompt

Grid View

0SSRS.ReportingService2010.CatalogItemSSRS.ReportingService2010.CatalogItem

1@{Name=Verification Relational DS; Path=/Data Sources/Verification Relational DS}System.Management.Automation.PSCustomObject

Verification Relational DS/Data Sources/Verification Relational DS