As far as I can tell...some...thing is causing the CDTs to not properly generate the resource listing, causing the last (Liquid Water) to instead attach to Liquid Aluminum Oxygen. The Switch Window doesn't even populate with Liquid Water, even though it is a selectable option on the slider.
I can provide a full MM log if necessary, but the only mods touching the CDT2* series besides IFS and Warp Plugin aren't touching them in a way that modifies their IFS modules - there shouldn't be any external mods affecting the tanks in a manner that produces this issue;
KSP-Recall adds two modules related to recovery and editor attachment
PWBFuelBalancer adds a non-conflicting redundant jettison module (different module name to the ones native to the IFS parts)
USI adds one module to disassemble things into MaterialKits and one to tweak eva construction by making things cargo parts

Prior to posting, I had gone over things once more and found a minor discrepancy in InterstellarFuelSwitch\PatchManager\ActiveMMPatches\LiteFuels.cfg

@PART[CDT2???]:HAS[@RESOURCE[LiterVolume]]:FOR[IFSCDT130]{
  @MODULE[InterstellarMeshSwitch]:HAS[#moduleID[IFSCDTmeshSwitcher]]
  {
    @tankSwitchNames = #$tankSwitchNames$;HydraNitro;DNTO
    @objectDisplayNames = #$objectDisplayNames$;Hydrazine + DNTO;DNTO
    @objects = #$objects$;HydraNitro;DNTO
    @indexNames = #$indexNames$;HydraNitro;DNTO
    @fuelTankSetups = #$fuelTankSetups$;HydraNitro;DNTO
    @fuelTankCounter += 1
  }

This is obviously adding two setups, but is only incrementing the counter by one. I figured by changing that last element to += 2, it stood a decent chance of helping, but sadly, I saw no difference