Read problem

[TurzyRGD]

Hello
I have problem with read data.
To this time I used signal-backup-decode 0.1.5. I readed backup and in table messages is 30000 records and 2500 readed attachments.
At new system i install 0.2.3 and from the same backup in table mms i have 6400 records and 440 attachment.
Whats wrong with that?