Using Papers, I wanna make my bibliography based on the style of British Medical Journal (BMJ).
However, the style through Papers (i.e., CSL) is not correct (the correct is available at http://www.bmj.com/about-bmj/resources-authors/house-style)
Will this be corrected?
generally for styles that need corrections see here:
in your case you may actually be better off reporting this to Papers on
their forums directly - Charles there is usually very responsive to these
types of things.
This mailing list deals principally with development of the CSL language,
not individual styles.