My uncle is mechanic down here and fixes all sorts of cars and trucks. He gets a lot of issues due to poor quality regular gas (premium just got a lot closer to U.S. quality) and has seen, though rare, popping coils just after he changes plugs.

I also use TM plugs and no issues whatsoever.

 

ran these plugs for 2 years with only 'positive' results. from my experience your case is isolated.....no more info to offer besides good luck

 

another example of a D.I.S. mentioned before, with a centralized coil pack is the 7M-GTE MK3 Toyota Supra Turbo motor:

 

I ran the TM plugs in my GS3 for about a yr 1 1/2 and I had no problems with them. I only had good things to say about the plugs.