I know it's trivial but the table names used in some of your SQL statements do not match the the table names reflected in the results. For instance in step3:

SELECT *

FROM SalesOrderDetail

WHERE SalesOrderID = 43671

AND SalesOrderDetailID = 120

Heap (1 row(s) affected)

Table 'SalesOrderDetail_noindex'. Scan count 1, logical reads 1495.

This is true so far in steps 2 and 3.