Think of the missed base play in terms of an errant throw into DBT.
A) 1st play by an infielder, at TOP and prior to missed base.
1) Either a touch of 1B or a tag of the B/R is needed.
B) 2nd play by an infielder, at TOT or after base has been legally acquired by B/R.
2) F3 must tag the B/R and does not.
Sound good?
Edited for clarity.