Doing some troubleshooting now, to see if this is really an isolated issue, or a larger one, but I am attempting to rank up with The Perrin Sequence (already completed Steel Meridian and Arbiters of Hexis, wrapping up on Red Veil) from the negative standing I have.
I've been doing missions with The Perrin Sequence symbol on my chest, but the negative standing isn't being reduced, and it won't allow me to pay the Liability rank fee. I have plenty of Golden Potatoes and more than enough credits. The problem is that the negative standing won't decrease, as it should when you do missions with the symbol equipped.
Going to continue to explore this, but in the meantime, if anyone else is having issues with any of the syndicates, do please post here.