Hey Keith! Welcome to the board!
I see what you mean there. Ben slides both the 2nd and 4th strings down but the tab only shows the 4th string sliding down. If I had to guess, Ben probably did that because there’s no way that I know of to tab out the 2nd string first ringing and then sliding without being picked again. The software would require another 3 on the second fret to begin the slide, but the tab would make it look like you’re picking the 2nd string again.
If you need it, I can edit it the way you like and send you a copy, but it’s probably OK to just know to leave that index finger planted and slide it down, too.