How about as an explaination...PLOA is at company discretion and open ended from both sides..therefore they come off list cause they may never return.. A pilot out for medical has a guaranteed sen number for xxx years until he gets his medical back.. A pilot on mil leave has a defined term of absenc by law.....therefore stays on list????

I see/ assume, upon re-reading, that you are tracking BES not system seniority. Initially, I thought you were talking system seniority....which I could never figure out by the 1 number that you appear to be concerned about how you could even notice a disparity.

Gimmevsp has a possible explanation IF you are talking 1 number...not hundreds though if thats what you(others) are insinuating.

BTW...thanks to the posters on bringing me up to speed on an open seniority list
Let us know if you figure it out