When AWS linked accounts moves between multiple billing accounts within the same month, the AWS Accounts page at the channel customer level may not show the AWS accounts linked under the correct Billing Account.
The reason for this is due to AWS accounts having billing data that belongs to 2 billing accounts for the current month. The platform will show the account's association to the billing account that was processed most recently in the AWS Account page. This resolves after the current month is finalized and completed processing.