With every picaxe forum and discussion i have ever been involved with it is always reserved that the word PIN is only used to denote refference to a input or output pin, if you want to talk about the physical IC pin numbers than that is expressed as LEG 1, leg2 etc.
This solve a large confusion problem and we all know what is being reffered to.
The later model chips (M2 and X2 chips) use a bank letter (A, B, C) prior to the pin number which makes it easier to know what is being reffered to, but the earlier chips only used the number that was derived from the raw PIC used as labelled by microchip.
Pete.