EricS. PA

I recently submitted a note in the economy special that includes notes valued at under $1000. The note is a $5 FRN San Francisco star note. From the second smaller run of I believe 1,900,000 notes. F-1988L*. I submitted the note in that tier because it has I believe possible an error, now I no expert in error notes. That is another field I'm trying to get into. Regardless the treasury seal seemed to bleed from the front to back of the note. So I thought I would pay an extra what $10 to get the note checked to see if that was possibly an error. Well recently I got an email stating that the note was bumped up to standard tier which costed me an extra $10 to grade. When I called PMG the women said that the note was valued by their graders to be over the $1,000 maximum for the economy special. I am very confused the books I use to get a roundabout value for notes says in the in 63 and above would be valued around $35-38. I actually paid around $20 for the note. I wondering if anyone on here can help or shed some light on why they think this note is valued at such a high amount. I don't recall the serial numbers. But I'm almost positive it wasn't a fancy number or anything. Any help would be very much appreciated. Thank you