Using Endnote Sync with Ulysses

Hi, I use Endnote X8 with Ulysses and it works really well. The only thing not working is syncing across computers, because the the sync feature does not retain record numbers. (To use Endnote with Ulysses one uses temporary citations in Ulysses’ footnotes and then format the references and bibliography in Word or using the RTF tool after output.)

Has the issue with inconsistent record numbers been fixed in Endnote X9, or does it suffer from the same problem? 

If not: Has anyone found a workaround to ensure record numbers to be identical across computers? 

I hope it can be solved …