I ran Extract Values To Points, then renamed the RASTERVALU field and alias to something else, and used the output of the first run as the input for the second run. I renamed the field and the alias again, verified that the changes were saved and repeated the process.
Now that I have 3 sets of extracted values, I see that there are 3 fields with an alias of "RASTERVALU". The field names retain the name I chose for them.
I didn't see anything mentioned about this in the documentation. Is this expected behavior?