I am working on an issue where UPS is returning very high rates for express shipping options. We previously were not returning a live rate.
I went into the rtshipping.ups and added our 6 digit account #, and set live rates to true. But from what I can tell, we are still not getting live rates.
If you have successfully setup Real Time Rates and have verified they are being pulled (use the AppConfig: RTShipping.DumpXmlOnCartPage on the Standard checkout), but do not like the rates being pulled (too high or low), then check/set the following AppConfigs:
RTShipping.MarkupPercent (affects ALL returned rates, can be negative)
RTShipping.DefaultItemWeight (used when product weight is not available)
RTShipping.PackageExtraWeight (added to all orders)