I hope this isn't some awful noob mistake, but attached is a save game in which my resource flows are in the negative 1-2k but:
*All planets show positive resource income on the galaxy tab (except a few showing -1 for a resource type not present on that planet).
*The resource flows tab clearly shows a positive income of minerals and crystal.
*I am not aware of building anything expensive anywhere.
Any help would be welcome. :-/