Looks like I don't have a tare weight set. I checked with someone who actually ships from our company, and their rates matched my osCommerce rates. You were right - we have negotiated rates and I didn't know it. Thanks for the help!!
I just started testing my UPSXML installation and everything works great until I compare the rates to the rates I get at www.ups.com. The ups.com rates are always higher (but by amounts that vary with different shipping methods). For example, a 10 lbs package's rates: osCommerce | UPS $9.38 | $13.68 $31.14 | $40.15 $49.16 | $62.14 $57.10 | $72.09 $82.38 | $94.62 $92.07 | $105.18 $130.40 | $143.51 Any ideas on what's going on or how I can find out? Thanks