The plugin "highlight portals you can upgrade to a specific level" also highlights portals I definitely can not upgrade, i.e. I can not upgrade a portal to L8 which already has one of my L8 resos.
A bug has been discovered where IITC was failing to lookup your own player GUID, which meant that any tests for things being 'yours' - for highlighters and elsewhere, could be wrong.
The plugin "highlight portals you can upgrade to a specific level" also highlights portals I definitely can not upgrade, i.e. I can not upgrade a portal to L8 which already has one of my L8 resos.