Management are total idiots when trying to understand a simplistic thing such as the RCA Matrix. It really amazes me that they all just don't get it or they just don't WANT to get and do it their power-n-control way.
Simple. Your Matrix is a mess and not done correctly by any means. Seniority picks (3) choices FIRST (a Primary and either (2) secondary slots OR (1) secondary and (1) tertiary, the 3rd, slot). So senior sub picks first and on the line down to the lowest who gets the crumbs. Since your Matrix is a mess and incorrectly done, you have NO CHOICE but to grieve this. Management will not change it, nor will they listen. A call to your Steward will right it and most likely without even you having to grieve it. He/She will call your PM or Super and tell them to do the Matrix correctly or SOMEONE in that office will file. If you can't get your Stew to do it, call your Assistant State Steward...contact number should be in the UNconcerned carrier rag.
Common problem. Management just are complete idiots. Only thing though....I don't know how your seniority looks, but once you get to re-do the Matrix, don't count on getting that route that will be vacant for awhile...the other buzzards are circling, too and need work.
Call your Stew. He/She will call management and threaten them because you are correct in that they did NOT do the Matrix correctly. You all will pick again and life in the PO WILL STILL SUCK....LOL.......welll......it will still suck.
Good luck.