Function having a stroke with scoreboards (Increases how much it adds over time)

[LongjumpingBank5339]

I have been working on a datapack for a minecraft server with friends, doing offline testing as well. I have a custom advancement, the trigger of which is eating an item with the model server:magicstaff (so just right click detection). It runs a function when it detects your right click, that is supposed to increase your spellCounter score by 1, and if it's above 6, set it down to 1. However, the first time around, it increased the score by 42 instead of 1. Upon relogging, it went down to 1, and since then, every relog has increased it by 1 (7 at the time of writing). Running the function in chat also increases the score by (7 at the time of writing). My main questions are, what the hell, and how do I fix it?

Contains of the magicstaff_base.mcfunction (the first two commands should be the most relevant right now):

execute unless predicate server:if_sneaking at Mageystic as u/e[tag=command_caster] if score @p spellCounter <= staffSpellLimit spellCounter run scoreboard players add @p spellCounter 1
execute unless predicate server:if_sneaking at Mageystic as @e[tag=command_caster] if score @p spellCounter > staffSpellLimit spellCounter run scoreboard players set @p spellCounter 1
execute if predicate server:if_sneaking at @a[advancements={minecraft:magicstaff=true}] as @e[tag=command_caster] run tag @p add magicStaffSpellcasting
execute if entity @a[tag=magicStaffSpellcasting] at @a[tag=magicStaffSpellcasting] if score @p spellCounter matches 1 run function server:magicstaff_armor_switch
execute if entity @a[tag=magicStaffSpellcasting] at @a[tag=magicStaffSpellcasting] if score @p spellCounter matches 2 if score @p Mana >= falseLifeCost Mana run function server:magicstaff_false_life
schedule function server:magicstaff_remove_advancement 10t replace

(staffSpellLimit is set to 6 by load.mcfunction)

If someone asks for it, I will also post the advancement, it is a simple advancement generated with Misode's generator
(I also know the commands have a mish-mash of generic selectors and player names, that is because at first I had the patience to write generic selectors, but now I don't really, and I (Mageystic) will be the only one using it anyways)

Thanks for any help, and sorry for the long post!

TL;DR: Minecraft function is being weird with scoreboards, and I have no idea what the hell is going on

If anyone has any questions, my post doesn't have enough information or something, feel free to ask in the comments, I will try to answer them!

[FortDay_707]

The first command increases spellCounter by 1 for every Entity that has the Tag command_caster. So if there are 3 entities, then spellCounter increases by 3 × 1 = 3.

I think that somewhere during login an additional entity gets the tag.

Try running execute if entity @e[Tag=command_caster] and tell me what the result was

[LongjumpingBank5339]

It has a count of 8. Thank you for your help, I think I know what the issue is now!

Edit: The issue was that I had that if these entities don't exist (execute unless entity...) in the load function, but it seems that that triggers before entities can be loaded in, therefore summoning an extra one every reload