Binary modules not importing

we are a little confused about modules being imported into PSU.
if we download for example invokequery (msql module) from the gallery which only has a manifest and a dll it doesnt seem to be automatically imported into PSU, we have to load it directly in the dashboard with import-module. - is this to be expected?
this isnt a big hassle, but we see other oddities when trying to import modules.

Have you tried adding your module to the environment?