1) Login issues is not related to our theme.
You used out of date version or Master slider. Also, I don’t see any slider created with Master Slider. If you don’t use this plugin then disable it, every additional plugin slows down the site.
2) Edit category and add description http://prntscr.com/ngv32z
To enable Related products go to Theme Options > Single Product > Display related products > on.
3) No, we always show the upsells there with that title. Related products are located below the product tabs. If you want to change the title (instead of “Our offers”) use translation files but instead of translation add the necessary text.
