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My liege is making the titular kingdom of Kent despite me doing thr ai = no to all minor English kingdoms/

What it looks like:
If your formation requirements look like that you're using a REALLY old version of the mod. It should look like this (edited to make the change you are wanting).
Code:
k_kent = {
   color = { 115 42 199 }
   capital = 73 # Kent
   culture = saxon
   allow = {
     ai = no
     is_title_active = FROM
     is_adult = yes
     has_regent = no
     war = no
     ruled_years = 5
     top_liege = { NOT = { has_law = kingdom_lockout_0 } }
     OR = {
       FROM = { has_holder = yes }
       FROM = { is_titular = no }
       ROOT = {
         lower_tier_than = king
         culture = saxon
       }
     }
   }
}

Don't just copy/paste this into your current folder. You need to update the mod and probably start your game over, I doubt something that old is save compat.
 
Don't just copy/paste this into your current folder. You need to update the mod and probably start your game over, I doubt something that old is save compat.

Yeah thought it might be that. I maintained an old version of game and mod to play a very extended playthrough that I'd revisit on and off for years, but that turned into a permanent thing given the way the game is being steered since Charlemagne which is against my tastes, plus the game runs better from this version for me (well, until the latter centuries, no surprise) which carries over to the mod. I kept a back up of everything on my main comp and almost lost is reformatting last month forgetting it.

If it's a bug from the older version I understand and am fine with it. Thanks though for all your help, Vukica.
 
Back again.

Found my problem with my file editing not taking was that I'd kept the zip of the mod in the mod folder to open and use in case I needed to revert things not realizing the .mod file was set to work through the zip and not through the folder I extracted.

Issue I'm running into my game atm comes from the AI having created 3 custom kingdoms in Middle East that are now in a Seljuk blob, ones which I've had the Seljuk destroy only for them to be recreated.

I've tried looking around landed_titles for the ability add ai = no under a custom title list but I can't find one, nor can I locate one in my save of the game.

I'll keep looking but anyone know there's an ability to disable their recreation?