If you receive Hotbird, it means that you have either a monoblock LNB or two LNBs and a DiSEqC switch.
Most TNTSAT receivers only work correctly if Astra is in DiSEqC position 1, (which is not the case with most monoblocks).
If Astra is not in position 1, automatic channel list and software updates can be missed because the receiver is looking for these updates on DiSEqC position 1, even if Astra has been configured on position 2 at initial setup.
This is a bug common to many TNTSAT receivers.