1250kbps really isn't enough for 720p@30; the minimum for relatively poor-quality 720p is 1500kbps, with 2000kbps being strongly advised.
It may be time to downscale to 480p, or cut to 20fps if you can't bump the bitrate. Personally I'd go to 480p in that situation, as few view Twitch in fullscreen mode, and the smaller resolution would give the potential to go down a step or even two on the x264 encoder, to deliver better quality video even if it's 480p.
Also, is there a reason you have 10 graphics captures active in one of your scenes? Any you aren't using really should be unchecked, as they'll cause overhead.
You also may want to set your webcam up as a Global Source, so it doesn't have to turn off and then back on again each time you change scenes (meaning faster scene changes, and getting the quick-fade instead of the hard cut).
Your connection did have a couple of minor network issues, but nothing to be over-concerned about... very few frames dropped, well below the level for real concern.