Yichin. Its nice to see so many people who are interested in the correct phrasing. As a Social Dancer it doesn't much matter in the Foxtrot and the Quickstep about rhythm and phrasing. But to be a competition dancer it is a must. That goes for Latin even Jive.
Your question on bar 7 and 8. You will have no trouble picking the 4 bar introduction. So there should be no trouble finding bar 7 and 8 as long as you know it is there. We have a style of dancing called New Vogue It is either a 16 bar Foxtrot tempo ,or in V. Waltz tempo, 32 bar phrased, then start again. To coin a phrase Every man and his dog understands phrasing. Sequence Dancers in the UK will also know what phrasing is. Best Wishes.