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I dealt with a similar situation for a client.
My suggestion is obtain a background check yourself. It may be a slight hassle, but it's the best way to verify whether your case has actually been expunged.
Here is is a link with information as to how you can submit an information request: https://www.fbi.gov/about-us/cjis/identity-history-summary-checks
I hope this helps!
If you submitted the proper paperwork to the State Patrol (which it sounds like you did), then that should be sufficient. It's the arresting agency's obligation to submit the "R-84 is the Final Disposition Report Form" to the FBI, which should detail the fact that your arrest has been expunged.
The only thing left to do is to verify that it's actually been expunged, which is what you're doing now.
Expungements happen fairy often, so it's not a rare occurrence. You haven't indicated anything that would lead me to believe that the State Patrol's correspondence to the FBI will be ineffective, or any other red flags that would lead me to believe anything out of the ordinarily will take place in this scenario. (If, for instance, the State Patrol was refusing to notify the FBI of your expungement, then we would be having a different conversation.)
You're quite welcome!
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