Yes, the problem is that the numbers after the dash in a deb package relate to packaging changes. To the left of the dash, its changes to the 'upstream', ie Lazarus changes.
So, if they, debian, change the content of the version.inc file, they have to rev the full version number, if they do some tweak to the packaging, they just change the number after the dash.
They must have done that tweak, reved the number after the dash but not the number in version.inc (because, obviously, that would require changing the full release...)
Its a joke .....
I have started a discussion with someone within the pascal dev team on that topic already, in a slightly related context, no response yet.
Davo