It's completely normal. All those songs were moved from one music section to another, and not everything could be saved, like the download count and date. There is nothing to worry about it.
Not directly related to smwcentral, but to the gitlab server:
If I try to git clone http://caffie.net:31415/root/smw-irq.git
I get this error:
Cloning into 'smw-irq'...
fatal: git fetch_pack: expected ACK/NAK, got '
I don't know if you have the intention to fix this, but as described here (https://github.com/gitlabhq/gitlab-shell/issues/120) the error is maybe related to the version of nginx being < 1.4.
Hope this helps.