checkpost.asp sub question

Just trying out the postpone option on the form element and get it to work on one site but not on another but really not sure why. After looking into this I find the routine checkReferer in file checkpost.asp. My question is, the way this is setup, wouldn't it be wrong everytime?

Request.ServerVariables("HTTP_REFERER") is http://www.domain.com/sample.asp

Basically, get domain name into two variables:
ServerURL = "http://www.domain.com"
ServerURL2 = "https://www.domain.com"

The next section gets just the domain name from the url passed and based on length of the ServerURL it gets that info:
TestURL = "http://www.domain.com"
TestURL = "http://www.domain.com/"
Then it checks to see if strings are different.

Function checkReferer()      'Get Name/Address of this Server      ServerURL="http://" + Request.ServerVariables("SERVER_NAME")      ServerURL2="https://" + Request.ServerVariables("SERVER_NAME")      'Find length of Name/Address of this Servers URL      CheckLength=len(ServerURL)      CheckLength2=len(ServerURL2)      'Make the URL to Test      TestURL=left(Request.ServerVar iables("HTTP_REFERER"),CheckLength)      TestURL2=left(Request.ServerVa riables("HTTP_REFERER"),CheckLength2)      If TestURL <> ServerURL and TestURL2 <> ServerURL2 Then            checkReferer = 0      Else            checkReferer = 1      End If End Function

Wouldn't TestURL2 always be wrong if your not coming from a secure (https) location? And then TestURL would be wrong if coming from a secure location?

Needs some clarification on this one.
Thanks.