What is MFLI and DFI tooth composites I saw in my dentist invoice?

According to my invoice it seems that I received following two treatments for the same tooth on the same day. Does it make sense or they double recorded a single operation ?

"Composite 4 surface Anterior MFLI"
and
"Composite 3 surface Anterior DFL"

Thank you.
Thanks for the message. I’m sure that she didn’t fill any other teeth. But she separately worked on left and right sides of the same teeth (#9). In this case, I’m wondering if it is common that dentists consider two diferent fillings ?

I know! Composite refers to a white resin filling. One filling was 4 surfaces:
M=mesial (the surface is one that the floss touches when you floss and usually touches another tooth as well. It is the side closest to the front of the face) F=facial (the surface that you see when you look in the mirror at your teeth) L=lingual (behind the facial, the back of the tooth, facing the tongue) I=incisal (the biting surface of either a front or a back tooth) D=distal (the opposite of mesial, closest to the back of the mouth) Mesial and distal surfaces are the surfaces you make contact with when you floss.
The second filling was 3 surfaces.
The maximum number of surfaces per tooth (no matter which tooth) is 5 (mesial, distal, facial, lingual, and incisal-sometimes called "occlusal" when it is on a back tooth.)

You got charged work on two separate teeth, probably next to each other (the mesial surface of one, would have contact with the distal of the other, and this is common) This is definitely two teeth!

It sounds right…those were big fillings! A crown would have been better on the tooth with 4 surfaces, but it probably costs cosiderably more. Large resins on a front tooth do not hold up well for long, and stain fairly easily, so take special care of it. good luck.