USA Day Traders and Tax Treatment of Dividends and Interest

[Algerita]

I have a question about where to report dividend and interest income earned from a day trader's trading account. According to The Tax Advisor, Traders, whether they take the mark to market election or not, must report dividends and interest from their trading account on schedule C. So, I am trying to understand the logic: If interest and/or dividends are reported on schedule C, self-employment taxes will apply to that income, right? Also, no qualified dividends are reported on schedule B and taxed at capital gains rates, correct? And finally, no 199 dividends get reported, so therefore no QBID deduction? Thank you in advance to anyone who helps me out.