Powershell Adding multiple arrays of different columns to a main array - arrays

Question

Code:
$arr1 = "" | select blabla,blabla2
$arr2 = "" | select blabla3,blabla4
$arrtotal = #()
$arrtotal += $arr1
$arrtotal += $arr2
$arrtotal
Printout:
blabla blabla2
However, when attempting to print both cells individually (not one after the other but simply selecting in PS ISE and hitting F8):
$arrtotal[0]
blabla blabla2
$arrtotal[1]
blabl3 blabla4
EDITED:
I would have expected both array columns to be printed when printing $arrtotal. Not just one of them. Further more it's unclear to me why printing them individually works but one after the other i.e "$arrtotal[0];$arrtotal[1]" does not.
EDIT2:
This is my original code.
All it does is query Sparkpost's API in order to build a custom HTML report.
$test = (Invoke-WebRequest "https://api.sparkpost.com/api/v1/metrics/deliverability?metrics=count_injected,count_sent,count_bounce,count_accepted&from=2016-01-01T08:00&to=2016-04-25T08:00" -Headers #{"Authorization"="xxxxxxxxxxxxx";"Content-Type"= "application/json"}).content | ConvertFrom-Json
$fill1 = "" | select EmailsReceived,EmailsSent,EmailsBounced
$fill1.EmailsReceived = $test.results.count_injected
$fill1.EmailsSent = $test.results.count_accepted
$fill1.EmailsBounced = $test.results.count_bounce
$fill2 = "" | select DeliveredPrecentage,BouncesPrecentage
$fill2.DeliveredPrecentage = [math]::round($test.results.count_accepted/$test.results.count_injected*100,2)
$fill2.BouncesPrecentage = [math]::round(($test.results.count_bounce)/$test.results.count_accepted*100,2)
$arr = #()
$arr += , $fill1
$arr += , $fill2
My problem is that I cant simply convert $arr into an HTML file like I've done numerous times before.
$arr
EmailsReceived EmailsSent EmailsBounced
107 107 12
On the other hand
$arr | Format-List
EmailsReceived : 107 EmailsSent : 107 EmailsBounced : 12
DeliveredPrecentage : 100 BouncesPrecentage : 11.21
I'd like to make an HTML out of everything so I can send it via email later. How can I pipe it all?

Answer 1

Its because $arr1and $arr2are two different PSCustomObjects. You can print the whole arrayin a list using the Format-List cmdlet:
$arrtotal | Format-List
Output:
blabla :
blabla2 :
blabla :
blabla2 :
Answer to your edit:
This looks like a single record for me, try this:
$record = [PsCustomObject]#{
EmailsReceived = $test.results.count_injected
EmailsSent = $test.results.count_accepted
EmailsBounced = $test.results.count_bounce
DeliveredPrecentage = [math]::round($test.results.count_accepted/$test.results.count_injected*100,2)
BouncesPrecentage = [math]::round(($test.results.count_bounce)/$test.results.count_accepted*100,2)
}
$record | convertto-html | out-file file.html
Note: I also changed the logic to create the object to a more well known approach using a PsCustomObject typecast on a hashtable.