[FIXED] Ring counter does not update correctly if rings are subtracted

I'm creating some sort of joke hack for a friend, where monitors act the opposite of how they are meant to act.
What's making me have problems is the ring monitor.
The ring monitor is meant to subtract 10 rings from the ring counter, or to take all of them away if you don't have enough.
On a technical side, this is fully functional, but on a graphical side, it works correctly only if you have 20+ rings.
If I've got 11-19 rings, the HUD will not show the changes, despite the fact that you actually have lost 10 rings, and it will show your extra 10 rings until you don't actually get 10 rings.
A demonstration can be found in this video:

Spoiler: Click here to show the video.

If, however, I have less than 10 rings, the ring counter will NOT underflow. It will go to 0, but the ring counter will not update. You will just see the flashing "RINGS" text.
A demonstration can be found in this video:

Spoiler: Click here to show the video.

You may want to also check my code:

Spoiler: Click here to show the code

Code:

Pow_ChkRings:
        cmpi.b    #6,d0        ; does monitor contain 10 rings?
        bne.s    Pow_ChkS

        subi.w    #10,(v_rings).w    ; subtract 10 rings to the number of rings you have
        ori.b    #1,(f_ringcount).w ; update the ring counter
        cmpi.w    #0,(v_rings).w ; check if you should have less than 0 rings
        bge.s    Pow_RingSound
        clr.w        (v_rings).w ; sets ring count to 0
        ori.b        #1,(f_ringcount).w ; update the ring counter

    Pow_RingSound:
        music    sfx_Ring,1,0,0    ; play ring sound

 

iirc you are just supposed to or $81 instead of 1 ro the ring counter update flag

 

I have tested this, and it works perfectly! This may come in handy in the future, so I'll keep it in mind.
Thanks for your help and sorry for the basic question. I guess this thread can be locked.