How can I OrderBy in my Linq query on a property from an Included table?

I have the following Linq query that I need to add an OrderBy clause to that I can't get to work.  I am using EF.

var dbRecords = _db.REF_Referrals
                                .Include("REF_ReferralStatus")
                                .Where(r => r.REF_ReferralTypeReferralTypeID == referraltypeid && r.ReferralsKeyString == key);

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Here are the relevant classes:

    public partial class REF_Referrals
    {
        public REF_Referrals()
        {
            this.REF_ReferralStatus = new HashSet<REF_ReferralStatus>();
        }
    
        public int ReferralsID { get; set; }
        public string ReferralsSynopsis { get; set; }
        public int ReferralsRequesterProfileID { get; set; }
        public System.DateTime ReferralsSubmittedDate { get; set; }
        public int REF_ReferralTypeReferralTypeID { get; set; }
        public System.DateTime LastUpdateTimeStamp { get; set; }
        public string ReferralsKeyString { get; set; }
    
        public virtual REF_ReferralType REF_ReferralType { get; set; }
        public virtual ICollection<REF_ReferralStatus> REF_ReferralStatus { get; set; }
    }

    public partial class REF_ReferralStatus
    {
        public int ReferralStatusID { get; set; }
        public int ReferralStatusRequesterProfileID { get; set; }
        public int REF_StatusStatusID { get; set; }
        public bool ReferralStatusIsCurrentStatus { get; set; }
        public System.DateTime ReferralStatusUpdateDate { get; set; }
        public System.DateTime LastUpdateTimeStamp { get; set; }
        public int REF_ReferralsReferralsID { get; set; }
    
        public virtual REF_Status REF_Status { get; set; }
        public virtual REF_Referrals REF_Referrals { get; set; }
    }

    public partial class REF_Status
    {
        public REF_Status()
        {
            this.REF_ReferralStatus = new HashSet<REF_ReferralStatus>();
        }
    
        public int StatusID { get; set; }
        public string Status { get; set; }
        public System.DateTime LastUpdateTimeStamp { get; set; }
        public int Priority { get; set; }
    
        public virtual ICollection<REF_ReferralStatus> REF_ReferralStatus { get; set; }
    }

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I need to sort the referrals by the Referral Status Priority of the ReferralStatus record IsCurrentStatus == true .  The problem I have is by Including the ReferralStatus it retrieves all ReferralStatus records for a referral.

1. How can I retrieve just the ReferralStatus record whose property IsCurrentStatus is true?
2. How can I put an OrderBy clause so the Referrals are sorted by Status Priority, Status ID, Date Submitted?

Any help is greatly appreciated.