You can see current Decred intensity coefficients in detailed statistics ("s" key). So if you set "-dcr 50" but Decred intensity coefficient is 20% it means that GPU currently mines DCR at "-dcri 10".
You can also specify values for every card, for example "-ttdcr 80,85,80". You also should specify non-zero value for "-tt" option to enable this option.
NOTE: Check "KNOWN ISSUES" section. GPU indexes in temperature control sometimes don't match GPU indexes in mining!
I didn't find specification of option -dcr. Could you explain this option, or is a mistake in the description?
Fixed, it must be "-dcri 50" instead of "-dcr 50".