None of these have video. They're all submitted and verified by renason. Is this a bug?

maybe?

it's all outcome of SRC having IL leaderboards the way they are. WCG and NO NOS have the only difference in Corvette/R8 being banned in WCG runs, and since challenge series have set cars, they're just filling up the WCG board with N/A runs, showing they do not accept any runs there :)