Yes, IRS has determined you were entitled to the check by their records and had it in the process to send you. Then, when they see that you also included it in your requested return refund, they are adjusting the return refund amount by the check amount you are receiving to make sure you are not overpaid.
Yes, IRS is starting to compare the recovery rebate requested returns with the stimulus checks being sent out to taxpayers that are "crossing in the mail" and is adjusting some refunds by the stimulus check mailed separately and reducing the tax return refund by the check amount now sent.
