How to manage heading spacing among aligned baselines?

I have headings and subheadings mixed in with body text, and I'm aligning the baselines to the grid. The body text aligns properly, but the spacing for some of the subheadings relative to the body text is sometimes amiss creating too much gap between it and the body text (compare Poster 13 versus Poster 14). The leading for the headings and subheadings are fractions of the baseline leading (13.2 points). I am wondering if there is something I can do automatically to adjust the leading of the heading/subheadings to avoid these occasional gaps. The other alternative is to wait until the text is finalized and then manually attempt to forcefully reduce the gap for each individual heading/subheading, but I'm not even sure that would work.