Retirement tax questions

Just to be clear:

In 2016 you contributed $5,518 to your Roth.

In 2017 you had the trustee of the account to make the excess $18 a 2017 contribution instead of a 2016 contribution.

Is that correct?
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**