Agreed bristol. And gavin, Vale are having a worse "wobble" than us. Unless they improve big time, they won't overtake us, so it would need 3 other teams, not 2, to put us down to 4th.
As for next season. I don't think our 'form' or otherwise for the rest of this season will matter in regards to next season wether we get promoted or not.
I don't think I've seen any year when the Gills team (or any other team for that matter) has not differed greatly from the previous season. That's in terms of personnel, playing style and individual skills. And it is especially different when it's a different division being played. So, if we went gangbusters and romped the league by 10 points, I wouldn't say we're gonna walk div1. Conversely if we stagger over the line or via play-offs, I wouldn't say we'd struggle next year. In both cases there would still be a lot of ins/outs, changes, improvements etc etc.