Clean Slate Glitch?

Old glitch, kinda. What happens with any scroll, is usually the following:
Check if a slot exist.
If a slot exists, do the following:
Remove a slot.
Add the effects the scrolls give with the probability of the scroll.
If scroll failed and this is a dark scroll, explode the item with the probability of the scroll.

Now, this is what the white scroll does:
If the scroll failed and a white scroll was used, add a slot to the item.

Now, slates do this:
Check if the amount of upgrades on the item plus slots left is less than maximum amount of scrolls. ([item upgrades] + [slots left] < [base slots on item])
If the upper is true, do the following:
Add a slot.
If the upper is false, do the following:
Explode the item with the probability of the scroll.

Protection and spike does the following:
Add the effects the scrolls give with the probability of the scroll.

See the issue? They remove the slot before applying the scroll effect. That's the issue, not that cape for cold-protection is able to be scrolled more than once on a cape.

Anyway, the glitch discussion. I want to join in:

First I would like to state what a glitch is for people that doesn't already: A glitch is defined by Nexon as a feature that is not intended by the creators.

If we all agree on that, I will state this:
A feature can only be defined as a glitch by the creators, not by the users.

Now, we know that a glitch is not an intended feature. This means the creators have not programmed the code with this feature in mind. This again means that they may not be aware of the glitch from the day they released this glitch. But does it make it legal to use this glitch anyway? No, because a feature the creators do not know about, is (for the most part) not intended by the creators. Thus, using a glitch before the creators know about its existence is just as "legal" as using a glitch after the creators label it as a glitch.

Good. Now, we have not heard anything about this from Nexon. Therefore, my friends, we cannot be sure 100% if this is a glitch or not. Agreed?

Hopefully, you are all aware of something named common sense. We are going to use that now, because we're still unsure of the intendedness of the feature explained through the earlier pages:

Imagine yourself being in the shoes of a programmer from Nexon. You recently created this new scroll, named "Clean Slate scroll". What did you intend to do with this scroll? Did you intend it to add a slot to an item with a failed slot if the scroll worked? (given yes) Did you intend to add a slot to an item with a failed slot if the scroll failed, it didn't blow up, and you used a white scroll at the same time? ([insert answer])

This other time, you created other scrolls; "Protection for cape" and "Spike for shoes" scrolls. These one adds the effect that is stated, protection for cape and spikes for shoes with a certain probability, without using any slots on the item. Was this your intention? (given yes) If these scrolls are combined with a white scroll, and the scroll fails, they will add a slot to the item. Was this your intention? ([insert answer])

At both places, I will state no. Though I'm not thinking as a programmer at Nexon's headquarter, I do think with common sense. I may have overlooked something that makes this feature to an intended feature, but I surely doubt it. Why would a Nexon programmer design an item which gives a possibility to create a 500 slot cape?

That's how you have to think.