I believe we've always allowed it to be the lowest of your picks as the automatic compensation if you had multiple picks in the same round and you were required to give up a pick in that round as compensation.According to the Seattle Times, the Seahawks would send the No. 6 overall pick in the draft to Denver if they signed Brandon Marshall to a restricted free agent offer sheet.
The sides could always work out something different, but the direct offer-sheet compensation would be the 6th pick because Seattle acquired its other first-rounder (No. 14) via trade.
In reality, and not sure if it's part of the temporary NFL rules or not but probably not, seems like it is your ORIGINAL team pick as the one to use if you still have that pick.
I don't know if it's a big deal, but if we automate that process and it probably needs to be for long-term success of the league I'd have to build in the conditions of which pick gets exchanged by default.
Of course, teams have always been able to and will remain with having the ability to negotiate a slightly different compensation -- such as deciding between themselves that it's the higher pick in the round than the lower if both teams agree -- but this would just get written in as the default compensation if a team has multiple picks in the same round and must give one of them up as compensation for a signed RFA/Franchise player.