Poisonous Concoction of Bouncing & Rungraft of Refraction (bugged?) interaction

Poisonous Conconction of Bouncing and Runegraft of Refraction have a strange interaction that could be qualified as a bug, or at the very least incosistent or inaccurate wording in one or the other.

In short, Runegraft of Refraction removes any extra projectiles added to the skill *before* those are converted into additional chains, effectively resetting the number of chains to base value + 1 from the runegraft itself and therefore negating any additional projectiles added from other sources.

Given the Poisonous Concoction of Bouncing tooltip states: "Fires 1 Projectile" and the runegraft's first line says "Fire at most 1 Projectile" it would appear that this line should not affect the skill in any way - no benefit and no downside.

Is this the intended interaction or is it a bug?

"Modifiers to number of Projectiles instead apply to the number of times this Skill Chains"

Setting it to fire only 1 projectile evidently classifies as a modifier to number of projectiles, thus number of times it can change chain/bounce is force set to 1.

Yup, that's one way to interpret it and is fair enough. One could even say I got baited...
Having said all that, I would still say that the interaction between the two can be somewhat ambiguous, especially that the runegraft and skill tooltip (not gem) wording is so similar and seems to overlap.
The skill already says "Fires 1 projectile" before using the runegraft, and it continues to say the same when using it. So I would still like to know if this interaction is fully intended or not.

If yes - so be it. It would be nice if the wording was 'better' somehow since otherwise it might remain a bait for others in the future. (and PoB will need to be bugifxed to account for this interaction).

If not, of course a fix would be nice. :)