Its just another example of the inconsistency in the regs.
Jensen could use an average thats 8 years old.
Sundstrom cant use one from 4 years ago. because he had 2 years in the EL in between.
Palm Toft can use one thats 2 years old because he only had 1 year in the EL before returning.
Palm Tofts 4.92 is valid under the regs but that doesnt mean it is a fair assessment.