I haven't seen the tile in game, so I don't know what exactly you mean with 'that constant glow', but if it is always a little lighter than the tiles next to it, it might be because one of your main tile lights (ml2) isn't completely black (0.00392157 instead of 0.0). The number is so near to 0.0 though that you'd probably need very good eyes to see the difference in game.
Try to change the tile lights of this tile and the one next to it to a different colour than black in the toolset and see if your tile still appears lighter than the others.
Also sl1 and sl2 only have to be dummies, lights (flames) will be placed at their positions when you activate them in the toolset. Yours are both extra lights instead of dummies. Since they are also set to bright white light (1.0 1.0 1.0) it's very likely that they are causing your problem.
