"Only show my detrimental effects" filtering my DoTs

[dioxideUniversa]

Time:
February 5th, ~6:00 AM PST

Frequency:
Fairly often lately, 0-3 times per Syrcus Tower run

World name:
Ultros

Character name:
Angela Moray

NPC name:
n/a

Monster name:
n/a

Class/Level:
Ninja/50

Party or solo:
Party/24-man raid

In-game time:
~12 pm server?

Area and coordinates:
Syrcus Tower and n/a

Steps:
1. Have "Display only detrimental effects you inflict" under HUD setting enabled.
2. Be fighting a monster/boss with a high amount of debuffs, presumably a requirement--I've never seen this happen outside a 24-man. Possibly also due to being grouped with other Ninjas, but haven't paid super close attention to this problem yet.
3. Be doing normal rotation, applying Mutilate / Shadow Fang as usual.
4. Shadow Fang and/or Mutilate sometimes does not show up when re-applied, as if being filtered as someone else's debuff.
5. Attempting to re-apply Shadow Fang and/or Mutilate does not cause the debuff to reappear.
6. Waiting for the debuff to expire (though you can't see it for it's timer, obviously...) and then re-applying it corrects the issue.

Connection Specs
- Type of internet connection/provider:
Broadband / Time Warner Cable

- Modem maker/model number:
Motorola SB6121

PC Specs; I legitimately could not figure out how to produce specs akin to the sample in the sticky, which seems like a really big problem to me. No instructions? Here's a dxdiag, in any case:
-=-=-=-=- System Information -=-=-=-=-
Time of this report: 2/5/2015, 16:23:25
Machine name: ------------
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7600) (7600.win7_gdr.110408-1633)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 11/28/13 11:21:11 Ver: 13.01
Processor: Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz (4 CPUs), ~3.2GHz
Memory: 8192MB RAM
Available OS Memory: 8136MB RAM
Page File: 7670MB used, 8600MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 64bit Unicode
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Laptop Model Name: n/a
Laptop Model Number: n/a

Gamepad Manufacturer: n/a
Gamepad Model Name: n/a
Gamepad Part Number: n/a

Browser Information
- Name and version of the browser currently in-use:
Google Chrome Version 40.0.2214.94 m

- Internet Explorer Version:
8.0.7600.16385




Anyway, this bug is obviously a problem as it is extremely difficult to perform correctly as a DPS when you can't even see the timers of your own debuffs. These aren't debuffs that are overwritten by others, either, like Dancing Edge and Storm's Eye.