Curie Weiss law results a linear dependence of inverse susceptibility and temperature in paramagnetic region. Probably your sample exhibits more than one phase and therefore showing multiple transitions. In this case, the Curie Weiss fitting will give the information only about the magnetic transition which is at higher temperature.

I agree.

@Varun Chaudhary and Keka: I couldn't agree better. That had been my opinion but needed a second thought.

Thanks for your contribution