Good questions! We area actually just about to add in a tool tip to explain this, but in the meantime: there are certain characters that, when they appear as parts of more complex characters are simplified a bit so as to fit into the space more easily. We call these versions the "squished" versions, just to try to be as descriptive as possible. But you can also just answer with the name of the full, un-squished character and be marked correct.
I hope that helps, please let me know if you have any other questions at all,