Oh, now I know what you guys were refering to. Essentially, the date written on your personal order is different than the one displayed below the basses. That being said, there are two possibilities:
1) The programmers didn't do their jobs correctly and didn't update the notice on your personal order. The bass will ship later.
2) Your personal order is different meaning they'll ship it at X date written on your order. Little contradiction with this case: why bother telling us orders after april 11th if we're april 20th? No one's gonna go in the past and order it there. Why not just say after april 19th?
I know, I'm might be overthinking this a lot but guys, I'M BASSELESS! I NEED A BASS IN MY HANDS ! I'm currently practicing my slap on my guitar. RIP strings.