Thank you for posting this information and also adding an image.
Based on your post, and previous test post I have made (since update), it may clarify WHY, I completed Treasure pest even though I used /set easy 1. below are my previous test results... check quoted date/time to clarify difference:
Not conclusive enough material, still could not take full count of Quick Draw activating, but, will just post results anyway.
Results will show after comparison vs other items.
Please Note that I am using identical gear;
Mythical adamantium longsword, Damage: 64 to 646, +124% Enhanced Effect, +246 Max Mana, +1% Life Steal, +5% Mind Numb, +3% Critical Flux
Angelic tempered diamond plate mail, Physical Defense: 51 to 154, Magical Defense: 0 to 23, +16 Vitality, +38 Intelligence, +8 Life Regen, +2% Mind Numb
Arcane focused heal XIV, Heals: 138 to 166, +3 Vitality, +1% Experience Gained, +1% Damage Return, +1% Critical Flux, +11% Quick Draw, +1 Jubilance
Magical wild heal XII, Heals: 48 to 481, +107% Enhanced Effect
Code
SS Huntress = Lvl 55 = Str 44 / Dex 13 / Int 61 / Vit 100... Gear Adds: Int 38 / Vit 19: = Total: Str 44 / Dex 14 / Int 99 / Vit 119
Level 55 - 60: Time: 57m 09s - Actions: 1712 (Att+Heal) - Total Dmg = 528078 - Total Heal = 115796 - Evil Presence = 1
Level 60 - 65: Time: 1h 11m 55s - Actions: 2156 (Att+Heal) - Total Dmg = 630323 - Total Heal = 170979 - Evil Presence = 2 + Treasure Pest
Level 65 - 70: Time: 1h 20m 43s - Actions: 2471 (Att+Heal) - Total Dmg = 734120 - Total Heal = 228124 - Evil Presence = 2
SSPro = Lvl 55 = Str 44 / Dex 13 / Int 61 / Vit 100... Gear Adds: Int 38 / Vit 19: = Total: Str 44 / Dex 13 / Int 99 / Vit 119
Level 55-60: Time: 0h 59m 11s - Actions: 1747 (1546 [att] / 201 [heal]) - Total Dmg = 534213 (0 / 346 / 1360) - Total Heal = 119898 (42 / 597 / 1360) - Evil Presence = 2
Level 60-65: Time: 2h 45m 55s - Actions: 1768 (1434 [att] / 334 [heal]) - Total Dmg = 534802 (0 / 373 / 1336) - Total Heal = 144936 (20 / 434 / 3222) - Evil Presence = 2
DavidWilson: Lvl 55 = Str 44 / Dex 12 / Int 61 / Vit 100... Gear Adds: Int 38 / Vit 19: = Total Str 44 / Dex 12 / Int 99 / Vit 119
Level 55-60: Time: 1h 04m 45s - Actions: 1871 (1627 [att] / 244 [heal]) - Total Dmg = 560520 (0 / xxx / 1350) - Total Heal = 118473 (31 / xxx / 1940) - Evil Presence = 3
Level 60-65: Time: 1h 06m 53s - Actions: 2048 (1754 [att] / 294 [heal]) - Total Dmg = 603634 (0 / 349 / 1350) - Total Heal = 174053 (35 / 403 / 2703) - Evil Presence = 3
Level 65-68: Time: 0h 51m 40s - Actions: 1536 (1248 [att] / 288 [heal]) - Total Dmg = 449384 (0 / 399 / 1464) - Total Heal = 145848 (36 / 477 / 2548) - Evil Presence = 2
Level 68.25-68.84: Time: 0h 11 00s - Actions: 341 (276 [att] / 65 [heal]) - Total Dmg = 96901 (0 / 351 / 1093) - Total Heal = 36329 (41 / 559 / 2595) - Evil Presence = 1
Level 68.84-70: Time: 0h 21 56s - Actions: 675 (521 [att] / 154 [heal]) - Total Dmg = 184909 (0 / 355 / 1232) - Total Heal = 69999 (37 / 455 / 2313) - Evil Presence = 4
SSPro: Lvl 60-65 Time is debunked as I was totally drunk during that run and doing other things. Completed 65-71 without taking notes.
DavidWilson: Lvl 60-65, did some welling, in between, did not take the information, also stopped at intervals between 55-60, thus averages were incorrect.
DavidWilson: Lvl 68.25. Server Shut down notification. No time to complete.
DavidWilson: Lvl 68.84. Overrun by Slugslider, did not want to regen and ruin time, so I remade: Note: I haven't regen'd in every test, don't want to start.
NOTE: I also had Treasure Pest activate @ level 70 to 71 which is NOT added into the test results using DavidWilson.
EDIT: CTRL+F = (find), then type Treasure) and you will find it easy on the page. Or... just read SSHuntress results.
Re - EDIT: dang... did not realize you are only level 15, this could also be a factor to the issue. I posted with a level 38 character with exact objectives? WTF has happened with the coding!!!