`pkg_info -m` incorrect

[beavers]

`pkg_info -m` is currently showing dependencies that were not manually installed. This seems to happen every so often, and the only way I can think to fix it is to remove the main package that pulled in the dependencies, then `pkg_delete -a`, then reinstall the main package. Although quite often, a dependency listed by `pkg_info -m` belongs to a number of main packages, each discovered in turn as I go through this process.

Is there a simpler way of accomplishing this? Manually editing the pkg db somehow?