Going to the bank is the first job on my father's to-do list. Any problem with this
Yup... "Go to the bank" is the first thing
yes, it should be "on" rather than "in"
On a list is far more common than in a list. It is quite wrong not to accept the preposition 'on' in this case.
On is the more precise preposition in English. Both are acceptable, and it is infuriating that this hasn't been addressed yet.
This is frustrating
In the previous sentence DL only accepts "on" (nobody sees your name on the list). Here, vice versa!