You have to use the correct status for your father. If he is remarried, then he’s not (for tax purposes) divorced or HOH.
If you were using the data retrieval tool on the FAFSA, it should have picked up the error.
All you can do now is provide the information asked for. If your step mother doesn’t contributed to the family income, it may not matter (same income as what was reported?). You may also have a larger family size, with the step mother as an additional member.