Article with two DOIs diferents

hello i have a problem. in my journal in the same article i have two DOIs different, one is correct and the other is wrong.
I don’t understand why DOI generate this.
i leave here the two links the same article:
My version OJs: 2.4.5.0

Good:
http://revista.esepf.pt/index.php/sabereducar/article/view/294
Bad:
http://revista.esepf.pt/index.php/sabereducar/article/view/294/pdf_49

Can anyone help me!!

Hi!
You have option to select which object should get assigned doi in the DOI Plugin Settings, uncheck Galleys from that option.
If you would like to show doi on article page as well as pdf galley page, do not use default pattern of DOI suffix. Instead, use the same custom pattern for article and galley both so that same doi get assigned to the galleys.
Pattern instruction is available in doi setting page.

thank very much!!
It´s much simpler than i thought.

regards