Hi Jaden,
[quote user="Jaden Ghylin102047"]Is this a limitation of the stack or the hardware?[/quote]
It's a software limitation. Might be that some of our module vendors (see www.ti.com/ble-wiki for a list) have implemented what you seek.
[quote user="Jaden Ghylin102047"]Also, can the CC2540 act as a central device and a peripheral device?[/quote]
Of course :)
Best Regards