Strange timing

I ran a lot of passes this weekend and I can't figure out why I have a dip in timing in first gear. The IAT shouldn't be pulling timing.

Also, what do you think about the TM in the image, is it too aggressive? Am I losing a lot of time?

Why am I seeing knock when TM kicks in?

Figure the timing out atleast. Seems my IAT was 122* when I hit the throttle and it rose to 124* at the middle of the gear which kicked in my -3* IAT spark correction. Then when it hit second the air started to go down in temperature and ended up at 109* at the top of third. This is interesting. It means it has to suck the hot air out from under the hood first. You would think a little speed would push colder air in and get registered long before the top of first gear. These GTO's have horrible ventilation...