Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain. In a small saucepan, bring vinegar and sugar to a boil. Boil for one minute. In large bowl, combine vinegar mixture, Catalina dressing and Italian dressing. Mix well. Add pasta, cucumber, olives, tomato, onion, carrots, and bell pepper; toss. Season with celery salt, salt and pepper. Refrigerate until serving.