THANK YOU!Your configuration is set to 1080p output at 60fps. Both your webcam and capture card are set to 720p at 30 and 60fps though. I would definitely recommend to change your base resolution to 720p in this case.
Recording/Streaming at 1080p is also very stressing on the cpu which could lead to the skipped frames you encountered.
I've been having this issue, and switching from OBS-MP 32 to OBS-MP 64 solved the issue for me