Thanks for mentioning this -- I've moved the warnings section to be shown below the seriesbox. The change will be visible on pages after they've been purged.
The warnings section is a fully automated section that dynamically changes its contents based on the rest of the page. Any additions should preferably match that, and be designed around automatic population so that they're added to all other articles as well were such a warning is applicable.
What editors can do, however, is exploit the fact that the warnings are added to the very bottom of the infobox by, well, merely adding new bullets that they want to appear as part of the warnings list below the infobox. This, however, isn't technically supported nor established, so no guarantees are given -- such an approach might very well break in the future.