Regarding "It looks like you may need to amend your 2018 return, here's why: your 1099-R reports earnings on a contribution you made in 2018. This information needs to go on your 2018 return," you don't have to amend 2018 if your 2018 tax return reflects the recharacterization. That's what we discussed in your other question. Also, TurboTax uses the same message for both code R and code P Forms 1099-R, but earnings are only relevant to code P, not to code R.
Ignore TurboTax's summary totals. Total Withdrawals is probably including the $1,000 from the code R Form 1099-R which is irrelevant to your 2019 tax return. What matters is what is on Forms 1040 and 8606. If you want to see if the extra $1,000 in Total Withdrawals is coming from the code R Form 1099-R, delete that form from 2019 TurboTax.
