Inconsistent Layout Display of Checkout Page

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.4.5
-- PHP version -- : 5.5.30
-- Browser(s) name and version -- : Chrome 47.0.2526.73 (64-bit)

Hi; I am having trouble determining how to make the Checkout page display consistently when I click the "Proceed to Checkout" button from a static page (like the Home Page, or the About Page) - versus when I click the "Proceed to Checkout" button from a dynamic page, like one of the product gallery or product detail pages.

For example - if I add an item to my cart, and then click the "Proceed to Checkout" button from a dynamic product detail page, (like this: www.p3proswing.com/site2/index.php/shop-...s/simulator-packages ) the layout is displayed correctly.

But - If i go to the Home page ( www.p3proswing.com/site2/ ) and click the "Proceed to Checkout" button, the layout is displayed Incorrectly - the components appear to be repeated in three columns and there are elements from the home page layout in the background.

I have uploaded a video showing and explaining the problem to YouTube here: www.youtube.com/watch?v=xjr_Z8qQzsw&feature=youtu.be

If it helps - this issue appears to be related to the URL path, maybe?

When I click "Proceed to Checkout" from the Home Page... the URL path that loads is this: " www.p3proswing.com/site2/index.php/component/hikashop/checkout "

When I click "Proceed to Checkout" from the Packages product gallery page, the URL path that loads is this:
" www.p3proswing.com/site2/index.php/shop-...or-packages/checkout "

I think that somehow - the "/component/hikashop/checkout" url is tied to a different template? And that is why it is loading a different layout than the "/shop-all-products/simulator-packages/checkout" url? I just don't know how to correct it so they all load the SAME layout.

Please help.
Thank you
-shawn