You are at Case Select "Start" because a bit of ASP at the top of the page queried the form fields and asked if there were any passed variables named "mycase" with values that are named "Start", Case2, Case3, and so on. If the form field was blank (like when you first landed on this page) then it sent you to case "Start".
<% Dim mycase
If Trim(Request.Form("mycase")) <> "" Then
mycase = Trim(Request.Form("mycase"))
Else
mycase = "Start"
End If%>
When you click the submit button (above) the form wil post to this SAME page (index.asp) but the ASP code will see that the passed variable name "mycase" has a value of "Case2" and you will be taken to the next Case Select. As you will see, this is just like posting to a second page.
<form method="POST" action="index.asp">
<input type="submit" value="SUBMIT" name="B1" class="dirbut" >
<input type="hidden" value="Case2" name="mycase">
</form>