Many authors in bibliography listed as et al. and 2 papers by same author and year not listed as a,b

I'm using the Behavioral, Ecology and Sociobiology citation style (one of the Springer styles) and it seems to have some mistakes. When there are 4 or more authors, it lists them as et al. in the bibliography. However they should all be listed. I have tried changing the et al requirements, setting them to the maximum of 18 both in advanced settings and under the bibliography and nothing changes. Also, two papers by the same author and same year should be listed as Smith 2007a,b in the text, but both are listed. Also two papers by the same author and different years should omit the duplicate author (Smith 2007, 2009). However this also isn't happening. Is there a fix to the citation style? Or how can I make these changes happen manually. Thanks! Ysabel