diff --git a/pkg/types/clusterconfig/availability_zones.go b/pkg/types/clusterconfig/availability_zones.go
index fa67259613..b1f2077ada 100644
--- a/pkg/types/clusterconfig/availability_zones.go
+++ b/pkg/types/clusterconfig/availability_zones.go
@@ -24,23 +24,14 @@ import (
 var _azBlacklist = strset.New("us-east-1e")
 
 func (cc *Config) validateAvailabilityZones(awsClient *aws.Client) error {
-	var extraInstances []string
-	if cc.Spot != nil && *cc.Spot && len(cc.SpotConfig.InstanceDistribution) >= 0 {
-		for _, instanceType := range cc.SpotConfig.InstanceDistribution {
-			if instanceType != *cc.InstanceType {
-				extraInstances = append(extraInstances, instanceType)
-			}
-		}
-	}
-
 	if len(cc.AvailabilityZones) == 0 {
-		if err := cc.setDefaultAvailabilityZones(awsClient, extraInstances...); err != nil {
+		if err := cc.setDefaultAvailabilityZones(awsClient); err != nil {
 			return err
 		}
 		return nil
 	}
 
-	if err := cc.validateUserAvailabilityZones(awsClient, extraInstances...); err != nil {
+	if err := cc.validateUserAvailabilityZones(awsClient); err != nil {
 		return err
 	}
 
diff --git a/pkg/types/clusterconfig/clusterconfig.go b/pkg/types/clusterconfig/clusterconfig.go
index 21a6a19131..fa715a2a73 100644
--- a/pkg/types/clusterconfig/clusterconfig.go
+++ b/pkg/types/clusterconfig/clusterconfig.go
@@ -497,24 +497,12 @@ func (cc *Config) Validate(awsClient *aws.Client) error {
 		}
 	}
 
-	// instance_distribution cleanup must be performed before availability_zone cleanup
-	if cc.Spot != nil && *cc.Spot && len(cc.SpotConfig.InstanceDistribution) >= 0 {
-		cleanedDistribution := []string{*cc.InstanceType}
-		for _, instanceType := range cc.SpotConfig.InstanceDistribution {
-			if instanceType != *cc.InstanceType {
-				cleanedDistribution = append(cleanedDistribution, instanceType)
-			}
-		}
-		cc.SpotConfig.InstanceDistribution = cleanedDistribution
-	}
-
 	if err := cc.validateAvailabilityZones(awsClient); err != nil {
 		return errors.Wrap(err, AvailabilityZonesKey)
 	}
 
 	if cc.Spot != nil && *cc.Spot {
 		cc.AutoFillSpot(awsClient)
-
 		chosenInstance := aws.InstanceMetadatas[*cc.Region][*cc.InstanceType]
 		compatibleSpots := CompatibleSpotInstances(awsClient, chosenInstance, cc.SpotConfig.MaxPrice, _spotInstanceDistributionLength)
 		if len(compatibleSpots) == 0 {
@@ -654,6 +642,14 @@ func CompatibleSpotInstances(awsClient *aws.Client, targetInstance aws.InstanceM
 
 func AutoGenerateSpotConfig(awsClient *aws.Client, spotConfig *SpotConfig, region string, instanceType string) error {
 	chosenInstance := aws.InstanceMetadatas[region][instanceType]
+	cleanedDistribution := []string{instanceType}
+	for _, spotInstance := range spotConfig.InstanceDistribution {
+		if spotInstance != instanceType {
+			cleanedDistribution = append(cleanedDistribution, spotInstance)
+		}
+	}
+	spotConfig.InstanceDistribution = cleanedDistribution
+
 	if len(spotConfig.InstanceDistribution) == 1 {
 		compatibleSpots := CompatibleSpotInstances(awsClient, chosenInstance, spotConfig.MaxPrice, _spotInstanceDistributionLength)
 		if len(compatibleSpots) == 0 {