No this this just a display problem of the website, see here and here. You can add as much sentences as you want.
Hey Stefan
thanks for answer, got another issue - why total number of
sentences doesnt change also? Is it same issue like counters on
profile?
- 25097 total sentences.
best regards
Hey, how old movies are we talking? Please take note that if the movie was released any sooner than 1950, or probably even 1940, the scripts, and, in effect, subtitles, are still probably protected by author rights, and thus unsuitable for common voice.
Hey, most of them are from 90’ - but the group who made
translations doesnt exists anymore
btw if You have ideas where from I can take source to make
sentences just let me know 
You may consider manually scraping some stuff from https://pl.wikisource.org/wiki/Wikiźródła:Strona_główna, they have a fair collection of usually guaranteedly CC0 texts.
Ruben told to not add sentences in collector from wikipedia …
Wikisources is a different project by the Wikimedia foundation, and serves basically only as a database of PD works. The restriction on Wikipedia is only on the main project itself (and possibly some of the other projects), and that is due to the reason that the content there is originally created by the Wikipedia contributors, who retain the rights to their content under the CC-BY-SA license or some similar (and thus, it is not CC0)
thx for the hint !!! i’m going to prepare batch from
wikisource then 
Ok -can You cleanup my sentences from movie subtitles then?
(aiteam) - i’m preparing new batch from wikisources
Will do this weekend.
@aiteam, please remember to add source of text when uploading them .
Also You can read this topic (among many others) which has some useful info for processing sentences https://discourse.mozilla.org/t/help-needed-in-processing-large-polish-text-base/40778. Since it seems You are knowledgeable in NLP and stuff (at least more than me, an amateur) maybe You would like to share your scripts with the community? I am sure we will find more sentence sources waiting to get processed in many lanuages.
Hey Kuba,
what type of infromation should be in source? (link, type eg.
wikisource, title of the novel/book)?
NLP is in my case is just beginning ;) when i'll be ready i'll
publish my sources
BR
Good to hear about NLP . Well I think material/book title and author would be good and maybe short url of website? When uploading texts from wolnelektury.pl I tend to put something like: Author;Title;wolnelektury.pl. And by the way You can skip this site as I already downloaded most of what was useful there.
Digression, is it only me or Your posts have odd formatting? To me they show as normal text
interupted by such text
ok- ill put source url of book/novel. Dont worry bout wolne
lektury i’m scrapping wikisource atm.
bout formating - maybe it’s mozillas thunderbird issue 
I can only find sentences with the source “own choosed and edited”, can you be more specific here?
that was eactly what i had meant
This is done. I haven’t run an export yet, but the deletion in the voice-web repo will be part of the next export.