Thanks. I think the current version should be already repaired.
old version cannot get new block because it had bug. new version can get new block because it fixed.

but new version will not accept old version node for security reasons, and we also changed the POS rate,
so it is not just a increase number fixed. And it seems no one can find a better way to let new version get block from 1. so it maybe the best solution till now.

what you are asking for is an impossible mission for us till now. and we had give a solution about this.
then we maybe need to build our exchange.