Feeds not mapping Item URL (link) to URL_source CCK field after switching from feedapi

I have a "text-rss" content type for feeds. I have a "text-alert" content type for feed items, with a "cck_link" called "source-URL" field that contains the source URL from the feed item.
This was working under feedapi, and not with feeds:

I checked the mapping and the ITEM URL(Link) from the source is targeted to a target field "URL", that doesn't exist on my targeted content type.

The field "source-URL" doesn't show up in the mapping list.

I am using the common syndication parser.

Did anyone meet the same problem?