E.M Pulinx:

Yes,the  individual parameters responding to a  wet/dry "levels"volume command are always  underlined in white.

What I am trying to find out is whether the ones that are changing wrongly are underlined.

E.M Pulinx:

Please, be kind  and let me know what to do in order to upgrade to v 5.5 .

Should it resolve my problem ?

Upgrade informnation is on the H8000 series support page. You will need a Compact Flash card and writer.

Can't say for sure that it will resolve your problem, but my 5.5 system does not have this issue. Anyhow, there are many worthwhile improvements.