Coins - OAI-PMH harvester - Zotero

Hello,
We are using the OAI-PMH Harvester plugin to agregate records of open access journal articles.
It works fine, but we have observed that when the reference is exported to Zotero, the url that is stored is the url of our repository, and the url of the original source is lost.
Perhaps someone using OAI-PMH harvester has solve this issue?
Thanks you.
Silvia