first of all, thank you for launching the new version of Zanata.org - uploading .json file is very comfortable for us.
Now, we have project Crystal (version 2018-05-24) in English and we tried to upload the translated text (in Spanish), but only dozens of pairs of translations were matched even though the whole translation has hundreds of translations which is ca half of the current source text. Please see attached files. For example, item "word sketch" is matched, but the item with the key "wordlist" is not.
The number of lines (and their order) does not correspond, but I would expect the translation works only with the keys which are unique.