shortcode option 'template' not work?

The following shortcode works fine, except the template, it still uses the default-bibtex not my-bibtex.

[bibtex file=myBib.bib group=year group_order=desc sort=year order=desc format=my-format template=my-bibtex]

Is there anything I should do to make my template works?

BTW, I found that the order of options seems order sensitive… If I exchange the order of ‘format’ and ‘template’, both of them are not working. … Or the length of options is limited?