As long as you have a witness who could "state and depose under the penalty of law" (put the quoted words in the affidavit) proving that you entered with inspection. You should be fine.
If USCIS used NO I-94 as evidence against you, fight back. stating:
1. you have a witness proving your legal entry.
2. making a record of your legal entry is the duty of the DHS officer, not yours.
3. if there was no record, it was because the employee of USCIS/DHS breached their duty.
4. You absolutely obeyed the law at the time of your last entry and was admissible at that time based on your valid H1B.
If they still fuss about it. Sue them.