Hello, I bought a 47pfl6007, I've upgraded to the latest firmware Versione: 000.150.085.000.

I have this type of problem:
Favourite list change by itself for no reason example:

original
1 (channel 1) - 2 (channel2) - 3 (Channel3) - 4 (channel4) - 5 (Channel5) - 6 (channel6)
changes in
1 (channel 1) - 2 (channel2) - 2 (Channel3) - 3 (channel4) - 4 (Channel5) - 5 (channel6)

if I delete or move the channel (Channel3) the result becomes

1 (channel 1) - 2 (channel2) - 2 (channel4) - 3 (Channel5) - 4 (channel6)

I do not know what to do, can you help me?

thank you very much