If the judge issued an order denying your motion to dismiss and plaintiff's attorney then served an amended complaint, then that's all that needs to be done procedurally to trigger an answer to the amended complaint. Ordinarily, you have ten days to answer an amended complaint unless otherwise stated in a court order. Usually the judge includes language in the order on the motion to dismiss as to how miuch time you have to responde to the amended complaint.
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It is not improper for that to have happened. The other side filed an amended complaint and you have 10 days to respond to the amended complaint. You can file another motion to dismiss if the complaint still has defects.
My colleagues are correct that under the Rules of Civil Procedure you have 10 days to file a response to Amended Complaint or as otherwise directed by the Court. It appears that you are litigating "pro se" against a party who is represented by an attorney. Regardless of the merits of your case, you are at a tremendous disadvantage if you are engaging in "motion practice" against a FL licensed attorney. I recommend you seek legal advice prior to filing a response to the 2nd Amended Complaint or if you are approaching a deadline, seek an extension to allow you to consult with an attorney. Under the Rules, there are certain defenses that must be raised with the first responsive pleading or otherwise they are waived.