diff --git a/pluginkit/evaluation_orchestrator.go b/pluginkit/evaluation_orchestrator.go
index c60f204..d74b161 100644
--- a/pluginkit/evaluation_orchestrator.go
+++ b/pluginkit/evaluation_orchestrator.go
@@ -119,6 +119,12 @@ func (v *EvaluationOrchestrator) AddEvaluationSuiteForAllCatalogs(loader DataLoa
 }
 
 func (v *EvaluationOrchestrator) addEvaluationSuite(catalog *gemara.ControlCatalog, loader DataLoader, steps map[string][]gemara.AssessmentStep) {
+	for _, existing := range v.possibleSuites {
+		if existing.CatalogId == catalog.Metadata.Id {
+			return
+		}
+	}
+
 	importedControls := getImportedControls(catalog, v.referenceCatalogs)
 	catalog.Controls = append(catalog.Controls, importedControls...)
 
@@ -212,6 +218,7 @@ func (v *EvaluationOrchestrator) Mobilize() error {
 					},
 				}
 				v.Evaluation_Suites = append(v.Evaluation_Suites, suite)
+				break
 			}
 		}
 		if !matched {
diff --git a/pluginkit/evaluation_orchestrator_test.go b/pluginkit/evaluation_orchestrator_test.go
index 1344307..06fb3cf 100644
--- a/pluginkit/evaluation_orchestrator_test.go
+++ b/pluginkit/evaluation_orchestrator_test.go
@@ -116,6 +116,71 @@ func TestEvaluationOrchestrator_AddEvaluationSuite(t *testing.T) {
 	})
 }
 
+func TestEvaluationOrchestrator_AddEvaluationSuite_DeduplicatesCatalogId(t *testing.T) {
+	orchestrator := &EvaluationOrchestrator{}
+	catalog := getTestCatalogWithRequirements()
+	orchestrator.referenceCatalogs = map[string]*gemara.ControlCatalog{
+		catalog.Metadata.Id: catalog,
+	}
+
+	steps := createPassingStepsMap()
+
+	err := orchestrator.AddEvaluationSuite(catalog.Metadata.Id, nil, steps)
+	if err != nil {
+		t.Fatalf("First AddEvaluationSuite failed: %v", err)
+	}
+
+	// Second call with same catalog ID should be silently ignored
+	err = orchestrator.AddEvaluationSuite(catalog.Metadata.Id, nil, steps)
+	if err != nil {
+		t.Fatalf("Second AddEvaluationSuite failed: %v", err)
+	}
+
+	if len(orchestrator.possibleSuites) != 1 {
+		t.Errorf("Expected 1 suite (deduped), got %d", len(orchestrator.possibleSuites))
+	}
+}
+
+func TestEvaluationOrchestrator_Mobilize_BreaksAfterMatch(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "test-mobilize-break-")
+	if err != nil {
+		t.Fatalf("Failed to create temp directory: %v", err)
+	}
+	defer func() {
+		_ = os.RemoveAll(tmpDir)
+	}()
+
+	cfg := setBasicConfig()
+	cfg.Policy.ControlCatalogs = []string{"CCC.ObjStor"}
+	cfg.Write = true
+	cfg.WriteDirectory = tmpDir
+	cfg.Output = "yaml"
+
+	catalog := getTestCatalogWithRequirements()
+	steps := createPassingStepsMap()
+
+	// Manually construct two suites with the same CatalogId to test break behavior
+	orchestrator := &EvaluationOrchestrator{
+		ServiceName: "test-service",
+		PluginName:  "test-plugin",
+		config:      cfg,
+		possibleSuites: []*EvaluationSuite{
+			{CatalogId: "CCC.ObjStor", catalog: catalog, steps: steps, config: cfg},
+			{CatalogId: "CCC.ObjStor", catalog: catalog, steps: steps, config: cfg},
+		},
+	}
+
+	err = orchestrator.Mobilize()
+	if err != nil {
+		t.Fatalf("Mobilize failed: %v", err)
+	}
+
+	// Should only execute the first matching suite due to break
+	if len(orchestrator.Evaluation_Suites) != 1 {
+		t.Errorf("Expected 1 suite (break after first match), got %d", len(orchestrator.Evaluation_Suites))
+	}
+}
+
 func TestEvaluationOrchestrator_AddEvaluationSuiteForAllCatalogs(t *testing.T) {
 	t.Run("Error Without Reference Catalogs", func(t *testing.T) {
 		orchestrator := &EvaluationOrchestrator{}