On my world cerys decided that fulgora stinks and moved down a lot.

I cannot reproduce your observation. Can you give more context? What other mods are you using?

From solar system alternating mods I have:

Redrawn Space compatibility, asteroid belt and that, orbital adjustement, planettier lib

but it seems to be mainly this mod, it's a bit weird cause the mods update a lot but I believe this one changed the cerys distance meanwhile another one flipped all my planet icons upside down

The only change this mod makes to the orbit of Cerys, is its orientation around Fulgora, when Dea Dia System is enabled (moving it out of the way of the connection between Fulgora and Dea Dia). The parent body and distance should remain the same.

Regardless, the problem seems to be with Orbital Adjustment, since I get this result when it's the only other mod enabled (besides Cerys)

Looking deeper into the code, everything they do is hard-coded, so I'm not even sure how or why Cerys gets moved. That mod should specifically only create 3 routes (nauvis-aquilo, vulcanus-aquilo, and vulcanus-fulgora). Then it changes the.. oh, Cerys didn't move. Fulgora got moved, and Cerys appears to not have accounted for the new position? Which is weird, because I would have thought PlanetsLib did some recalculation magic to keep satellites close to their parent bodies during final-fixes or something. How odd...

I also think this mod is antithetical to Redrawn Space Connections anyways; RSC tries to remove all the routes that overlap each other, while this mod.. makes even more of those routes. The end result of running both is that most of these new routes get removed, and you end up with something similar to the base game routes.

Honestly, somebody needs to make an incompatibility here, since they are clearly trying to do the exact opposite of each other

Uh............ Alrighty then, well in that case I only have one question remaining. How do you send pictures in here? It would be so useful to show what my map is doing with these solar system adjusting mods

How do you send pictures in here?

I upload screenshots to imgur (you can check this on that previous image using right click > open image in new tab, the URL is imgur), then link them here using Markdown formatting. Specifically:

![any text](link-to-image.png)

I use imgur specifically, because when you upload anything to it, it'll generate a list of links you can use to embed, the third option is Markdown Links, then you just add an exclamation point before the first bracket and it's done