Sometimes when Riffyn file are opened with excel you will see strange characters preceding the values in some of your cells. This is often seen with units since they sometimes have special characters (degree, or microliters).
To fix this issue, you can ask Excel to open files in an alternative format. This guide by Microsoft shows how to preferentially open files. When opening files from Riffyn, be sure to set your encoding to UTF-8 which should resolve any display issues.