Welcome to the forum, Lisa.
This is not a problem!
It has to do with the genetics of the plants.
Some people call them wine stains, some call it blotches, some say splotches, whatever it is, its not a bad thing!
I was just talking about this yesterday in another thread.
Scroll down to posts 9 and 10
Dwarf Lady finger
The other leaves do not have the blotches, but this most recent one does.
No worries!