Guild Wars 2

I was playing in PvP on an AI Thief and I realized that Sword 1 on the 3rd combo is reflectable by the thief’s spin. Is the 3rd Combo supposed to be considered a projectile in the first place or was this intended?

Yup,it’s supposed to be a projectile.

This skill unleashes three piercing projectiles that hit up to three foes each.

The three projectiles count as three attacks toward activating the Virtue of Justice passive effect.

The projectiles sent out can be blocked, absorbed or reflected by fields. If this happens, the skill chain will not break, forcing the player to use it again, wasting two attacks in total (or waiting for the skill to revert to the first chain).

https://wiki.guildwars2.com/wiki/Sword_Wave