diff --git a/app/components/BatchResultEntry.tsx b/app/components/BatchResultEntry.tsx
index 3bbffd0..9152639 100644
--- a/app/components/BatchResultEntry.tsx
+++ b/app/components/BatchResultEntry.tsx
@@ -44,14 +44,12 @@ type Stage = "idle" | "preview" | "saving";
 
 interface BatchResultEntryProps {
   participants: Participant[];
-  eventId: string;
   sportsSeasonId: string;
   existingResultParticipantIds: Set<string>;
 }
 
 export function BatchResultEntry({
   participants,
-  eventId: _eventId,
   sportsSeasonId,
   existingResultParticipantIds,
 }: BatchResultEntryProps) {
@@ -165,7 +163,7 @@ export function BatchResultEntry({
   }
 
   function handleConfirm() {
-    if (!allResolved) return;
+    if (!allResolved || rows.length === 0) return;
     setStage("saving");
     const results = rows
       .filter((r) => r.participantId !== null)
diff --git a/app/lib/__tests__/parse-results-text.test.ts b/app/lib/__tests__/parse-results-text.test.ts
index 496933e..69056fb 100644
--- a/app/lib/__tests__/parse-results-text.test.ts
+++ b/app/lib/__tests__/parse-results-text.test.ts
@@ -78,6 +78,14 @@ describe("parseResultsText", () => {
         { placement: 1, rawName: "Gerwyn Price" },
       ]);
     });
+
+    it("handles \\r\\n line endings", () => {
+      const input = "1. Gerwyn Price\r\n2. Luke Littler";
+      expect(parseResultsText(input)).toEqual([
+        { placement: 1, rawName: "Gerwyn Price" },
+        { placement: 2, rawName: "Luke Littler" },
+      ]);
+    });
   });
 
   describe("multi-line mixed formats", () => {
diff --git a/app/lib/parse-results-text.ts b/app/lib/parse-results-text.ts
index 8723f31..2d4732b 100644
--- a/app/lib/parse-results-text.ts
+++ b/app/lib/parse-results-text.ts
@@ -21,7 +21,7 @@ export interface ParsedLine {
 export function parseResultsText(text: string): ParsedLine[] {
   const results: ParsedLine[] = [];
 
-  for (const rawLine of text.split("\n")) {
+  for (const rawLine of text.split(/\r?\n/)) {
     const line = rawLine.trim();
     if (!line) continue;
 
diff --git a/app/routes/admin.sports-seasons.$id.events.$eventId.server.ts b/app/routes/admin.sports-seasons.$id.events.$eventId.server.ts
index 70a2765..e1b3515 100644
--- a/app/routes/admin.sports-seasons.$id.events.$eventId.server.ts
+++ b/app/routes/admin.sports-seasons.$id.events.$eventId.server.ts
@@ -363,6 +363,14 @@ export async function action({ request, params }: Route.ActionArgs) {
       return { error: "No results provided" };
     }
 
+    // Validate that all participant IDs belong to this sports season
+    const allSeasonParticipants = await findParticipantsBySportsSeasonId(params.id);
+    const validParticipantIds = new Set(allSeasonParticipants.map((p) => p.id));
+    const invalidEntries = incoming.filter((r) => !validParticipantIds.has(r.participantId));
+    if (invalidEntries.length > 0) {
+      return { error: "Some participant IDs do not belong to this sports season" };
+    }
+
     try {
       const existingResults = await getEventResults(params.eventId);
       const existingIds = new Set(existingResults.map((r) => r.participantId));
@@ -389,20 +397,15 @@ export async function action({ request, params }: Route.ActionArgs) {
 
   if (intent === "create-participant") {
     const name = formData.get("name");
-    const sportsSeasonId = formData.get("sportsSeasonId");
 
     if (typeof name !== "string" || !name.trim()) {
       return { error: "Participant name is required" };
     }
 
-    if (typeof sportsSeasonId !== "string" || !sportsSeasonId.trim()) {
-      return { error: "Sports season ID is required" };
-    }
-
     try {
       const participant = await createParticipant({
         name: name.trim(),
-        sportsSeasonId,
+        sportsSeasonId: params.id,
       });
       return {
         success: `Participant "${participant.name}" created.`,
@@ -410,6 +413,9 @@ export async function action({ request, params }: Route.ActionArgs) {
       };
     } catch (error) {
       logger.error("Error creating participant:", error);
+      if (error instanceof Error && error.message.includes("participants_sports_season_name_unique")) {
+        return { error: `A participant named "${name.trim()}" already exists in this sports season.` };
+      }
       return { error: "Failed to create participant" };
     }
   }
diff --git a/app/routes/admin.sports-seasons.$id.events.$eventId.tsx b/app/routes/admin.sports-seasons.$id.events.$eventId.tsx
index 8eda02f..b963899 100644
--- a/app/routes/admin.sports-seasons.$id.events.$eventId.tsx
+++ b/app/routes/admin.sports-seasons.$id.events.$eventId.tsx
@@ -417,7 +417,6 @@ export default function EventResults({
           {event.isQualifyingEvent && event.eventType !== "final_standings" && event.eventType !== "playoff_game" && !event.isComplete && (
             <BatchResultEntry
               participants={participants}
-              eventId={event.id}
               sportsSeasonId={sportsSeason.id}
               existingResultParticipantIds={
                 new Set(results.map((r: { participant: { id: string } }) => r.participant.id))