I have partially sorted this, I removed (unset) status from the orders.php which shortened the orders box width.
The cancel order button also caused the theme to break as too wide so removed the cancel button by css.
The orders table is not really responsive for smaller screens.
I can always revert the changes and set you up as a customer and add a few orders today so you can see?
I have it looking like this so far on the link below;
However the MY Account page for the theme is very dull when compared with storefront theme.
The My Account page has no styling, on the my-account.php it could do with the page being divided into 1/4 and the other half 3/4 so the Account content shows to the right on larger screens rather than below.