Special Orders / Repairs / Custom / Appraisals / Misc. all have "Days To Sell" of 1.

Layaways "Days To Sell" is from the time the item came into Inventory until the day it goes on Layaway.

When you buy in multiple quantities – you cannot sell the second item until the first item is sold – let’s look at two cases -

Case 1
On Jan 1st you buy an item, it sells after 130 days, you reorder, it sells at 130 days, you reorder at sells at 130 days.
So, sold 3 with average days to sell of 130

Case 2
As above but you purchased the 3 on Jan 1st.

Both cases we will report the same - sold 3 with each having "Days to Sell" of 130 days.