This is because Python is evaluating the "truthiness" of "Yes".
Your first if statement is interpreted like this:
if the variable "yearlikedislike" equals "yes" or the string literal "Yes" is True (or "truthy"), do something
You need to compare against yearlikedislike each time.
Try it like this:
if yearlikedislike in ("yes", "Yes", "YES", "yep", "yup", "Yep", "Yup"):
#do something
