Why on earth did HP swap around the primary function keys?

[damaltor]

Well, the Prime is not an alternative - first, i like the old ones, and second, it is an algebraic calculator which can use a bit of rpn - but i want an rpn calculator.

anyone else an idea to remap the number keys? i even tried making programs which do nothing but putting the number down - those could be easily mapped to the number keys, but if you press 123 then you end up with 1 in z, 2 in y, 3 in x instead of 123 in x.