Customized Prize Tier Fix - Need A Real PRO! (I Think)

OSCommerce Website: I had a customize price tier built for my site years ago and all the sudden it's not working the way it's supposed to. For the site: [login to view URL] ---------------------------------------------------- Click on any product page and you will notice the 12-35 price, 36-71 price, 72-143 price etc... The price tier is supposed to be per different product. The customer is supposed to be able to order different sizes and colors of the same product (item number) and the total amount added together of that item number should be their pricing tier for that product. EXAMPLE: Customer orders Item # G200 Gildan Tee. They order 10 small red, 10 medium red, 10 small black, 10 medium black. This would be a total of 40 pieces and would fall in the 36-71 price tier. If they then ordered Item # 2184 Anvil Tee it would be a separate tier (as it's a different item number) and would fall under its' own tier on however many the customer ordered. ------------------------------------------------------ Currently the tier is only giving the tier price on what the customer orders per size & color even if it's the same item number. ~NOT GOOD~ EXAMPLE: Customer orders Item # G200 Gildan Tee again. They order 12 small red, 12 medium red,12 Large red, and 10 small Purple. This should give them the 36-71 price tier. It DOESN'T. It only gives them the 12-35 tier for all. It's not adding them all together to equal 36. ------------------------------------------------------- I also need help changing shipping charges on a different Magento site. Should be easy, I just can't find where to change it at. Who Can Help & Not Kill Me On Cost??? Thank You For Your Time And Consideration! Keith