Checkboxes are set randomly

Dear all,

I'm fighting with randomly set check boxes in a particular dialogue:

$.writeln ("PaletteDocSettings1 -- IsDebug=" + settings.IsDebug + " Verbose=" + settings.Verbose + " EvalFeedback=" + settings.EvalFeedback); 
    wPalDS.p0.tabS.g1.pDbg.cbDebug = wPalDS.p0.tabS.g1.pDbg.add('checkbox',undefined,goTxt.wPalDSp0tabSg1pDbgcbDebug);
    wPalDS.p0.tabS.g1.pDbg.cbDebug.preferredSize.height = 20;
    wPalDS.p0.tabS.g1.pDbg.cbDebug.value = settings.IsDebug;
    wPalDS.p0.tabS.g1.pDbg.cbVerbose = wPalDS.p0.tabS.g1.pDbg.add('checkbox',undefined,goTxt.wPalDSp0tabSg1pDbgcbVerbose);
    wPalDS.p0.tabS.g1.pDbg.cbVerbose.preferredSize.height = 20;
    wPalDS.p0.tabS.g1.pDbg.cbVerbose.value = settings.Verbose;
    
    wPalDS.p0.tabS.g1.pDbg.cbEvalFeedback = wPalDS.p0.tabS.g1.pDbg.add('checkbox',undefined,goTxt.wPalDSp0tabSg1pDbgcbEvalFeedback);
    wPalDS.p0.tabS.g1.pDbg.cbEvalFeedback.preferredSize.height = 20;
    wPalDS.p0.tabS.g1.pDbg.cbEvalFeedback.value = settings.EvalFeedback;
$.writeln ("PaletteDocSettings2 -- IsDebug=" + wPalDS.p0.tabS.g1.pDbg.cbDebug.value + " Verbose=" + wPalDS.p0.tabS.g1.pDbg.cbVerbose.value + " EvalFeedback=" + wPalDS.p0.tabS.g1.pDbg.cbEvalFeedback.value); 

The first write reports:

   PaletteDocSettings1 -- IsDebug=false Verbose=false EvalFeedback=false

The second write reports:

   PaletteDocSettings2 -- IsDebug=true Verbose=true EvalFeedback=false

What has changed the settings for the first two check boxes?

Any ideas?