The level of severity decided on the basis of how 
functionality of the application would be afftected and on 
the basis of severity priority will be decided. Now, 
suppose Brand Name of the company is very important thing 
but from no where it will affect the funtionality of the 
application but need to be fixed very soon (can not delay 
or put on hold), therefore, this issue will consider under 
low severity and high priority.

If the company Logo is missing, definately it is Low 
Severity and high priority,  it is not effecting the 
functionality of the application so it is Low severity  
from customer's point of view it is very important to 
resolve so it is Hogh priority