Applying the 7x7 CalendarHOST. Up and down chiasm?

How is Second Timothy a 7th iteration of Numbers, and an 8th iteration of the 4th Day? Does this sequence make a ‘7 Days’? Or an ‘8 days’ were we to add the 4th Day at the beginning?

1 Numbers
2 Job
3 Ezekiel
4 Luke
5 2 Peter
6 Galatians
7 2 Timothy