Because the Sun will always begin October in your sector of adventure, travel, learning and discovery but end the month in your career sector, this is always going to see the solar spotlight shift from one side of life's fence to the other. However, within a six hour window from year to year, the Sun is going to make that shift at the same time and it will be clear cut, with no overlap, that is not the case for Mercury and Venus, the planets that rule the heart and mind. Venus and Mercury travel with the Sun, but not to the same strict timetable. You will never not have an overlap when one or the other is still in an adventurous part of your chart after the Sun has returned to your career sector or the other way round.
You are always going to have an overlap, with things moving professionally while there is still a strong sense of adventure in the air, but this year that overlap is going to extend across the whole month. While the Sun won't return to your career sector until 23rd October, by the time you move into the new month Venus has been here for three weeks and she will be joined by Mercury on 1st October. Venus is already three weeks into what is normally a 24 day visit and Mercury will normally move through in 14 to 15 days. Instead, a retrograde turn on 3rd October will keep Venus here until 25th October.
Thanks to a retrograde turn on 24th October, after retrograding back out, when she eventually returns in December, Mercury will still be here. This comes just as the dwarf planet Ceres is getting ready to do the same, except her retrograde turn in your work sector next month will keep her here until May and working with the planets on the career front for the rest of the year. Yet while the Sun will leave your sector of adventure, travel, learning and discovery empty when he leaves on 23rd October, it is just two days later that Venus will retrograde back in for a six week do over, opening the doors to the past and second chances. This makes this a month when it will be important to have some work/life balance guardrails in place from the start.