diff --git a/services/app-api/src/domain-models/contractAndRates/convertContractWithRatesToHPP.ts b/services/app-api/src/domain-models/contractAndRates/convertContractWithRatesToHPP.ts
index 0ad2968a29..c9ccbb8bf8 100644
--- a/services/app-api/src/domain-models/contractAndRates/convertContractWithRatesToHPP.ts
+++ b/services/app-api/src/domain-models/contractAndRates/convertContractWithRatesToHPP.ts
@@ -17,6 +17,7 @@ import {
 import type { ContractRevisionWithRatesType } from './revisionTypes'
 import { parsePartialHPFD } from '../../../../app-web/src/common-code/proto/healthPlanFormDataProto/toDomain'
 import type { PartialHealthPlanFormData } from '../../../../app-web/src/common-code/proto/healthPlanFormDataProto/toDomain'
+import { isEqualData } from '../../resolvers/healthPlanPackage/contractAndRates/resolverHelpers'
 
 function convertContractWithRatesToUnlockedHPP(
     contract: ContractType
@@ -91,7 +92,7 @@ function convertContractWithRatesToFormData(
     stateNumber: number
 ): HealthPlanFormDataType | Error {
     // additional certifying actuaries are on every rate post refactor but on the package pre-refactor
-    const pkgAdditionalCertifyingActuaries: Set<ActuaryContact> = new Set()
+    const pkgAdditionalCertifyingActuaries: ActuaryContact[] = []
     let pkgActuaryCommsPref: ActuaryCommunicationType | undefined = undefined
 
     const rateInfos: RateInfoType[] = contractRev.rateRevisions.map(
@@ -115,7 +116,13 @@ function convertContractWithRatesToFormData(
             } = rateRev.formData
 
             for (const additionalActuary of addtlActuaryContacts) {
-                pkgAdditionalCertifyingActuaries.add(additionalActuary)
+                if (
+                    !pkgAdditionalCertifyingActuaries.find((actuary) =>
+                        isEqualData(actuary, additionalActuary)
+                    )
+                ) {
+                    pkgAdditionalCertifyingActuaries.push(additionalActuary)
+                }
             }
 
             // The first time we find a rate that has an actuary comms pref, we use that to set the package's prefs
diff --git a/services/app-api/src/resolvers/healthPlanPackage/updateHealthPlanFormData.test.ts b/services/app-api/src/resolvers/healthPlanPackage/updateHealthPlanFormData.test.ts
index c065a25320..c39c52967d 100644
--- a/services/app-api/src/resolvers/healthPlanPackage/updateHealthPlanFormData.test.ts
+++ b/services/app-api/src/resolvers/healthPlanPackage/updateHealthPlanFormData.test.ts
@@ -257,6 +257,22 @@ describe.each(flagValueTestParameters)(
 
             // update that draft form data.
             const formData = Object.assign(latestFormData(createdDraft), {
+                addtlActuaryContacts: [
+                    {
+                        name: 'additional actuary 1',
+                        titleRole: 'additional actuary title 1',
+                        email: 'additionalactuary1@example.com',
+                        actuarialFirm: 'MERCER' as const,
+                        actuarialFirmOther: '',
+                    },
+                    {
+                        name: 'additional actuary 2',
+                        titleRole: 'additional actuary title 2',
+                        email: 'additionalactuary1@example.com',
+                        actuarialFirm: 'MERCER' as const,
+                        actuarialFirmOther: '',
+                    },
+                ],
                 rateInfos: [rate1, rate2],
             })