Custom grid with custom DAC, Multiple keys adding unwanted rows - acumatica

Question

I've created a very simple data entry grid, I'm having an issue when I attempt to assign more than 1 isKey value in the attributes on my custom DAC. I have two fields that I need to be unique as a pair, Direct customer and Indirect customer. When I add the IsKey = true to both Direct/Indirect the grid functions abnormally and adds two rows, one with a missing indirect.
When I remove one Iskey the grid functions fine, only when the second key is added the bug occurs. I'm trying to use Direct
Below bug added empty row when using two IsKey=true on Direct Customer and Indirect Customer.
Below when only one key is used on Direct Customer, correct functionality with no duplicate row.
Data View Declaration
Modified SQL Table for make Direct and Indirect customers to be a Primary Key
DAC declaration of the keys:
#region RecordID
[PXDBIdentity()]
[PXUIField(DisplayName = "Record ID")]
public int? RecordID { get; set; }
public class recordID : IBqlField{}
#endregion
#region DirectCustomer
[PXDBInt(IsKey = true)]
[PXUIField(DisplayName = "Direct Customer")]
[PXSelector(typeof(PX.Objects.AR.Customer.bAccountID),
typeof(PX.Objects.AR.Customer.acctCD),
typeof(PX.Objects.AR.Customer.acctName),
SubstituteKey = typeof(PX.Objects.AR.Customer.acctName))]
public int? DirectCustomer { get; set; }
public class directCustomer : IBqlField{}
#endregion
#region IndirectCustomer
[PXDBString(100,IsKey = true, IsUnicode = true, InputMask = "")]
[PXUIField(DisplayName = "Indirect Customer")]
[PXSelector(typeof(Search<PX.Objects.AR.Customer.acctCD,
Where<PX.Objects.CR.BAccountExt.usrIndirectCust, Equal<True>>>),
typeof(PX.Objects.AR.Customer.acctCD),
typeof(PX.Objects.AR.Customer.acctName),
SubstituteKey = typeof(PX.Objects.AR.Customer.acctName))]
public string IndirectCustomer { get; set; }
public class indirectCustomer : IBqlField{}
#endregion