Built In Shipping

[seekyourgeek]

I have a site that is using the Prestashop built in shipping module. I have set the shipping to go by weight. Everything we ship is done by ounces, however we have set the weight to the decimal value of lbs thinking that was the best way to do it. We have all of our range set in according to the same decimal version of lbs. 
The problem is when a person puts a qty of 6 or more items in their cart it will default to the Max shipping (as out of range) even though the actual weight is far below what that level is. 

I have tested it many ways and the actual items in the cart have no bearings as once you hit any mixed qty of 6 or more the shipping jumps up to Max (out of range) 
Any suggestions on how to fix this?  Since our items are very small and light many people order several (which quickly adds up to the qty 6) and when shipping cost almost as much as your items in the cart, people tend to not finish the order. We went from Shopify to Prestashop and this is the only real snag we have...

[selectshop.at]

I've moving your question to the correct forum section. Free and paid modules forum section is only for to present free or paid addons, but not for to answer general questions.