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I'm betting that the EEPROM has a low number of rewrite times. That's becoming more popular with newer microcontrollers (the newest MC68HC12 revision does the same thing).
As far as only one "pointer" (more properly termed an address register) goes, that's pretty common on microcontrollers. I didn't read through all the documentation but I believe that the PIC is accumulator based. It's nice to even have an address register at that point.
Matt
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