Comment by crazygringo

Yup. There are also a ton of other Greek letters in row E used in math... and no uppercase delta, which you'd obviously want, even more than many of the others. The only reason they wouldn't have included it down there was because they already included it above, exactly because it's DELta.

It still doesn't answer why it's a short uppercase delta though... I can only guess there was a failure of communication somewhere between who chose the character set and who drew the pixels...