How to reproduce:

>> - set up 20 languages
>> - activate async publication, do not start the daemon
>> - create a content, e.g. a folder
>> - create a draft of it in 13 languages (more than 10), do not publish them
>> - click on "publish" on 3 or 4 drafts
>> - start async daemon
>> - click "publish" on all other drafts
>> - check that current version has 13 languages
>> - check the version history
>>
>> =>
>>
>> 3 versions are listed as published!
>>
>> PS: I tested the same behaviour, but with less open versions than the limit (ie. opening 4 drafts in 4 languages, click "publish" on 2, start async daemon, click publish on the other 2), and I still manage to get multiple versions in "published" state
>
> ...and I reproduced it even without stopping async publication
> 1. create content with 14 translations
> 2. in the tab listing the translations, ctrl click on the edit button to open 14 drafts in 14 browser tabs
> 3. put mouse button above "publish button"
> 4. in quick sequence, hit "click" + ctrl-tab to go to next browser tab, and keep publishing all 14 versions as fast as you can
> 5. you end up with 3 or 4 published versions
>

without async publication, I could not manage to reproduce this. I tried my best to publish in parallel both untouched-drafts and previously-saved drafts (nb: all from one user account), and still I managed to get all my versions in a proper state, and without loosing changes