UPS handling charges (feature is broken)

I go to lists>accounting>shipping items and choose edit "UPS Ground" and I click on the "Handling Rate Table".  I choose "Shipping Table" as my method.  I enter 5 different weights and 5 different prices for the various weights.  I click on SAVE.  I go back to that same area and all of the data that I just entered into the table is GONE.

On a separate, but similar note.  Why does it have to be only one "handling calculation method" or another.  I would like it to charge a flat rate of $5 and also charge $.05 per pound.  It is restrictive that you click one method and the other disappears.  Why not let us set two or three rules and it combines the charges from all of the rules that we used?  That is how the "Yahoo store" did it and I miss that feature.