Actually the IFC came up with a Cheerleading World Championship before there was the USASF/IASF worlds or even the ICU worlds.... as far as I remember first IFC World Championship was already in 2001 (and then every two years)!
There actually was already an incident when the IFC worlds were in Germany in 09, when a Groupstunt did not compete because someone from the ICU threatened them that they were not allowed to compete in USASF /IASF worlds if they compete at IFC worlds (and they already had a bid for the next allstars-worlds).
Next IFC worlds will be held in November in Hongkong, so I guess they just wanted to bring this out right before to threaten the athletes, coaches and other people involved there enough to make the whole competition look like a joke...