Originally Posted by canadiancow

Neither is correct. It is absolutely not equivalent to "Business Class (flexible)", which would allow free same day changes as well.

Reward tickets are their own domain, and are do not line up with any revenue fare bucket.

All North American paid business fares allow free SDC on AC metal.

All Aeroplan business tickets allow free standby on AC metal.

Go find another agent, and drop the "it's a flexible ticket" line. You want standby, and you're entitled to standby. Don't say anything else.