Question about Superior Flamberge

Short answer (if my understanding is correct); No

From Amazon Basin;

https://www.theamazonbasin.com/wiki/index.php/Item#Superior wrote:

• When Enhanced Damage does not increase weapon damage, it becomes +1 Maximum Damage. This condition only applies if it is true for one-handed damage of javelins, throwing axes and throwing knives, and the two-handed damage of two-handed swords.

If I understand this correctly, for 2H swords, the 2H damage needs to not get increased by the ED% in order for it get +1 to max damage instead. In the case of Flamberge, it's 2H damage is 13-26. The max damage is 26, and the smallest possible ED% roll is 5, which means that a Superior Flamberge with minimum ED% would have 13-27 damage. That's an increase, so it would not be replaced by +1 to max damage. If this indeed is how it works, then the max damage of the base weapon's damage can be at most 19 (because 20 * 0.05 = 1). If so, the only 2H sword to which this rule can apply is Two-handed Sword.

Since I've never really given this feature much thought, I may be misunderstanding something. Hopefully someone can confirm.