I disagree. I'm a massive fan of the show, and have been watching it since the very first episode, unfortunately it's getting out of hand, the amount of time these producers chose to continue delaying wrapping up the show is sad, what could have been possibly my all time favorite show has almost become boring to watch. This should have been a 5 season max 6 season show. But to stretch it out to 8 seasons is just greedy. Half of this 7th season if not more, were entirely random episodes of blacklisters, completely unrelated to the bigger picture of who red is and were of no help to solve the bigger picture.
They are dragging it out and it's ruining a great show.
As far as the numbers go, they have not been reusing numbers, but the numbers are just random case file numbers and are of zero significance in labeling how important that blacklister is, that has been obvious for many seasons already.