My website www.aquatell.com was recently moved to the Shopify platform.  We chose to use the http domain, because we didn't want to change too much, too quickly by moving to https.  Only our shopping cart is using https protocol.  We noticed however, that https versions of our non-cart pages were being indexed, so we created canonical tags to point the https version of a page to the http version.  What's got me puzzled though, is when I use open site explorer to look at domain/page authority values, I get different scores for the http vs. https version.  And the https version is always better.  Example:  http://www.aquatell.com DA = 21 and https://www.aquatell.com DA = 27.  Can somebody please help me make sense of this?  Thanks,