dont change stream settings when stream is on...
enable vsync in game if its off
set resolution scale on video tab to 720p (image quality will be better with 540p) and fps to 30, disable scaling on output tab
23:17:13.537: Output 'adv_stream': Number of skipped frames due to encoding lag: 172039 (39.6%)
so 40% of your frames are gone like poof. it may fix itself when you enable vsync or your cpu is too slow for x264 and games and you should use quicksync to free cpu (target quality, profile high)
what is your max upload speed?
Number of dropped frames due to insufficient bandwidth/connection stalls: 405 (0.1%)
either some1 is uusing your connection when you stream or your bitrate is still too close to your upload limit