Hi Lottie123, 

Let's check if after manually updating you AMEX downloaded bank transactions, we'll be able to see the missing transactions. After updating, set the date range on the dates of the missing transactions. 

Here's how: 

1. In the Banking page, choose AMEX as the bank you want to update. 
2. At the upper-right corner, select Update. 
3. Then, set the date range using the filter icon above the DESCRIPTION column. 
4. Click, Apply. 

You'll want to look into this article for more instructions: How To Manually Update Bank Accounts. 

Reach out to us if you have other questions.