Opencart expert needed for minor fixes

Hello people, i need an OPENCART expert for some urgent fixes on my site. All issues must be fixed TODAY: no delays will be allowed. These are details about needed fixes: 1) Bugs on tax calculation on products with special or discount price 2) Low order fee applied if courier mode is selected 3) When you delete a product from catalog (if this product is on homepage or it's showed as big product on homepage) its record on table PRODUCT_TO_HOMEPAGE is not deleted.I need to delete this record too 4) When you add or delete a manufacturer on list you see this error on page /produttori: Notice: Undefined index: bits in /home/milleni5/public_html/system/library/[login to view URL] on line 16 5) User added to not default group : order total does not calculate tax on courier fee 6) Fix pagination page number PLEASE READ CAREFULLY ALL REQUESTS AND POST YOUR BID ONLY IF YOU ARE ABLE TO MANAGE AND COMPLETE THE PROJECT. Payment details : 100% milestone at project start. Milestone release will be completed ONLY when you will get my complete satisfaction.