Prestashop updates

I inherited a Prestashop website and I need someone to make a few updates the site. We are running Prestashop 1.5.4.1. 1) Fix backup to Dropbox module (backup is not working and I can't figure out how to change the Dropbox account in use) 2) Speed up the "Add To Cart" process. It takes about 5 seconds. 3) Update Grand Total on step 1 of the cart when applying a voucher/coupon code. We use AWOCoupon and it shows the coupon applied but the grand total does not update. (see attached screenshot) 4) Move voucher/coupon field to last step in check out process. Right now our cart rules for free shipping do not work. We get an error "You must choose a delivery address before applying this voucher to your order". We tried using AWOCoupon for free shipping codes but it shows the discount before the customer has even selected a shipping method. - If the field cannot be moved to the last step, we would like to be able to have free shipping codes that show the shipping as 0 when users get to the step in the checkout process. 5) Create a development copy of the website.