Only TNW will be warned for spawnkilling. XTM's argument is valid in that I can see the custom skin causing some confusion for default spawnlocs. As shown in the video, the minute he realized you were spawning in the designated points for that team rather than a /lastpos, he stopped and only shoot when you made the first attack. Spawn camping under such circumstances is therefore fine. TNW on the other hand had no regard and killed you every chance he had. Had he adjusted himself to the realization, no warns would've been given.
Solved.