Endnote swaps "Journal" and "Alternate Journal" fields when importing from Pubmed

I imported many references from pubmed, but the Journal and Alternate Journal fields are swapped. That means that when I try to format bibliography in AJP Regula Int Comp Phys, the journal names appear in full, instead of abbreviated as they should be.

Is there a simple way of fixing it (appart from editing the citations manually?)?

see  http://www.library.uq.edu.au/endnote/journal_terms.html and http://www.endnote.com/support/faqs/Styles/faq5.asp for details on how to fix this, and avoid it in the future.