Idle Animations from Daz Store – first frame keeps flashing to T-pose

Vizer

I just grabbed the Idle Animations Pack from the Daz Store, but whenever I apply a premade animation to a base G8 character, the very first frame flashes my base character into a T-pose. Just on that single frame. When I insert a 2nd animation sequence after, the first frame of the newly-added one animation also snaps to a T-pose for a single frame. 

Btw, these are preset animations in DUF format, and not Aniblocks. This is being applied to a base Genesis 8 character in a new project with an empty timeline. 

It looks like the culprit keyframes include these properties:

• (Left/Right) Shoulder Bend > Rotation
  • Front-Back
  • Bend
  • Twist

Removing these keyframes from the current frame does remove the T-pose, but it also causes the animation to jump, so I think there are other errant property keyframes still present.

Is there any way to delete all property keyframes, but only on the current frame? I would like to just erase all of the existing keyframes to see if that'll force interpolation between the surrounding, correct keyframes so that the animation can loop smoothly – i'm trying to turn this idle animation into my a saved Aniblock.

 Any help would be greatly appreciated!