ModLoader Version: Forge 47.2.17
Launcher: Curseforge
Minecraft Version: 1.20.1
Mod Version: 1.20-9.2.6

Description:
Adding the "seesky" rule into spawn.json will override the min/max height conditions when used together or in the same script. Here is the exact layout of the spawn.json file I used in testing:
[ { "dimension": "minecraft:overworld", "minheight": 58, "seesky": true, "result": "deny" } ]
In this case no other mods were being used besides InControl and all other scripts were empty besides sapwn.json. Then, when testing the script in a new world, mobs would spawn above the height limit under trees despite the condition "minheight" being set.

How To Replicate:
1) Create a spawn rule with both min/max height and the seesky condition ( true or false )
2) Create a new world
3) Load into new world

On further testing, I realized that this problem isn't a bug, but just a weird feature of the rule system. Since conditions apply to the whole rule, min/max height would only work on mobs that aren't spawning under a block if you used seesky with it. So the rule would only prevent spawns above the minheight (or bellow the max) if they wern't under a block. Here is my example:
`
[
{
"dimension": "minecraft:overworld",
"mod": "minecraft",
"minheight": 62,
"hostile": true,
"result": "deny"
},
{
"dimension": "minecraft:overworld",
"mod": "minecraft",
"maxheight": 62,
"hostile": true,
"seesky": true,
"result": "deny"
}

]
`

Sorry about that ;(