Hi Dianne,
i think iTunes needs to be “told” what you have removed manually.
With the phone plugged in, go to the sync page where you can see tick boxes of playlists, albums, songs etc.
I would guess that your talks are still selected in iTunes. Deselect them and click APPLY. This should mean the phone and computer are now back in sync.
Then reselect the talks you and APPLY.
GENERAL INFO:
When you have not made any changes to the tick boxes, it says SYNC, because you may have added songs to a ticked playlist, as an example.
When you tick or untick a box, it changes to APPLY.
if this does not work, remove ALL music via iTunes. Then delete any leftovers in:
Settings>>General>>iPhone Storage>>Music
then re add everything you want with iTunes. Good luck!☺️