Duplicating uv vertices? I downloaded an already made model

while i was adjusting the model, and removing doubles a hole appeared on the mesh



when i tried to fill the hole i expected something like the right side of the picture, but got this



is there a way i can add a vertex like the right side of the picture?
In the UV editor:


Select all and Pin all UV coordinates
Select the UV faces that you have added
Reset UVs and Unpin them
Unwrap
Select all and Unpin