Dirty taste in some Cajun seasonings

I love cajun, creole, and blackened foods. Can’t get enough!
The only problem I have is that there is a spice I have not been able to identify that is not necessarily a bad spice, but one that if they use to much of it overpower the others and it becomes almost dirty tasting for lack of a better term for it.
Can anyone help identify what that may be? It is disapointing when I order something out and it has that dirty taste. And I can not count the # of jars of cajun spices I have tossed out. And when I make a cajun season following recipes I have tried I know that I like each of the spices used individually or they woulding be in my cupboard. But I can not figure out what one or combo of two perhaps creats that dirty or overly unwashed herby/dirty flavor that ruins it for me.
Help! I want more cajun without the dirty taste added!

You can make your own spice mix tasting each spice before adding it to see it that is the one the produces the “dirty taste”.

Cajun Spice Mix
Ingredients
• 1/4 cup Kosher salt
• 1/4 cup cayenne
• 1/4 cup paprika
• 1/4 cup garlic granules
• 1/4 cup ground black pepper
• 2 tablespoons onion granules
• 2 tablespoons oregano, dry
• 2 tablespoons thyme, dry
Directions
Mix all ingredients and store in a jar.

Creole Seasoning Blend

1-1/2 teaspoons onion powder
1-1/2 teaspoons garlic powder
1-1/2 teaspoons dried oregano
1-1/2 teaspoons dried basil
3/4 teaspoon dried thyme
3/4 teaspoon black pepper
3/4 teaspoon white pepper
3/4 teaspoon cayenne pepper
1 tablespoon and 3/4 teaspoon paprika
2-1/4 teaspoons salt

In a small bowl, combine onion powder, garlic powder, oregano, basil, thyme, black pepper, white pepper, cayenne pepper, paprika and salt. Store in an airtight container.

Blackening Spice
• 1 tbsp toasted ground cumin seeds
• 2 tbsp paprika
• 1 tbsp salt
• 1 tbsp onion powder
• 1 tbsp garlic powder
• 1 tbsp plus 1 tsp cayenne
• 1 tbsp white pepper
• 1/2 tbsp thyme
• 1/2 tbsp ground black pepper
• 1/2 tbsp oregano
Place a cast iron pan over moderate heat for 4 minutes. Add the cumin seeds and toast until fragrant. Remove allow to cool and grind in a coffee mill. Add to spices.
Combine all ingredients and store in airtight container for up to 2 months.
Makes 1/2 cup spice mix.

Good luck!