What you can try is reboot the box, wait for it to finish booting check that Tuner A & B are DVB-S2 then plug the Geniatech t230 and check if it's added as C tuner or not.
If so reboot the box and I guess that you will fallback to your problem.
Do you install drivers for the Geniatech on your box?
You should cut and paste the output of dmesg.
Problem is often that they are using the same commercial name but have different chipset in the USB stick so you will probably need to install the proper driver.
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Sat: Hotbird 13.0E, Astra 19.2E, Eutelsat5A 5.0W
VU+ Solo 4K: 2*DVB-S2 + 2*DVB-C/T/T2 (used in DVB-C) & Duo 4K: 2*DVB-S2X + DVB-C (FBC)
AB-Com: PULSe 4K 1*DVB-S2X (+ DVB-C/T/T2)
Edision OS Mio 4K: 1*DVB-S2X + 1*DVB-C/T/T2