Quote from: gigi0ne on Today at 03:23:45 PM

The problem is that when the program does reindex, they all become 0/unconfirmed, not in memory pool.

The message means that the transaction doesn't exist in the blockchain or the mempool.
The transactions exist only in the wallet file and once you abandon it, you will no longer see that in your wallet.

Quote from: gigi0ne on Today at 03:23:45 PM

How is it possible that the transactions accepted in 2009 now have different hashes and thus are not recognized?

Most probably, the transaction wasn't broadcasted to the network successfully at all, let alone being included in the blockchain.

Quote from: gigi0ne on Today at 03:23:45 PM

if there was a way to post screenshots you would understand what I am saying easily

Upload your image to talkimg and share the link here.