The following script will determine if any stored procedures were renamed, rather than dropped and re-created (substitute [DATABASE NAME] with the name of your database):
SELECT meta.ROUTINE_NAME, *
FROM [DATABASE NAME].sys.sql_modules def,
[DATABASE NAME].INFORMATION_SCHEMA.ROUTINES meta
WHERE SUBSTRING(def.definition,1,4000) = SUBSTRING(meta.ROUTINE_DEFINITION,1,4000)
AND def.definition NOT LIKE '%![' + meta.ROUTINE_NAME + '!]%' ESCAPE '!'
order by 1
