@ManyToMany CDT creation

Hi there, I am attempting to have appian create a database schema from the XSD's I am creating, and unfortunately I need to work with a @ManyToMany relationship.

When using this code below (Which is up to JPA Spec for @ManyToMany relationships):  

Employee

<xsd:element maxOccurs="unbounded" minOccurs="0" name="skills" type="tns:CMD_Skill">
<xsd:annotation>
  <xsd:appinfo source="appian.jpa">
  	@ManyToMany(cascade=CascadeType.ALL)
  	@JoinTable(
  		name="cmdEmployeeSkill",
  		joinColumns = {@JoinColumn(name="employee_id")},
  		inverseJoinColumns = {@JoinColumn(name="skill_id")}
  	)
  </xsd:appinfo>
</xsd:annotation>
</xsd:element>

Skill

<xsd:element maxOccurs="unbounded" minOccurs="0" name="employees" type="tns:CMD_Employee">
    <xsd:annotation>
      <xsd:appinfo source="appian.jpa">
        @ManyToMany(
          mappedBy = "skills",
          fetch = FetchType.LAZY
        )
      </xsd:appinfo>
    </xsd:annotation>
</xsd:element>

My SQL DDL comes out like this:

create table `cmdEmployeeSkill` (
    `skill_id` integer not null,
    `employee_id` integer,
    `cmdemployee_skills_idx` integer not null,
    primary key (`employee_id`, `cmdemployee_skills_idx`)
) ENGINE=InnoDB;

create table `cmdEmployee` (
    `id` integer not null auto_increment,
    -- Other Meta as neccessary
    primary key (`id`)
) ENGINE=InnoDB;

create table `cmdSkill` (
    `id` integer not null auto_increment,
    `name` varchar(255),
    primary key (`id`)
) ENGINE=InnoDB;

create table `cmdemployee_cmdskill` (
    id integer not null,
    elt integer not null,
    `cmdemployee_skills_idx` integer not null,
    primary key (id, `cmdemployee_skills_idx`)
) ENGINE=InnoDB;

Take note of the extra table cmdemployee_cmdskill 

However, when I change the XML to this

<xsd:element maxOccurs="unbounded" minOccurs="0" name="employees" type="tns:CMD_Employee">
    <xsd:annotation>
      <xsd:appinfo source="appian.jpa">
        @ManyToMany(
          cascade=CascadeType.ALL, 
          indexed=false,
          fetch = FetchType.LAZY
        ) 
        @JoinTable(
          name="cmdEmployeeSkill", 
          joinColumns=@JoinColumn(name="skill_id"), 
          inverseJoinColumns=@JoinColumn(name="employee_id")
        )
      </xsd:appinfo>
    </xsd:annotation>
</xsd:element>

My DDL comes out properly

Does anyone have experience with this? 

I attempted to use this related discussion on a similar problem with a @OneToMany, but was not able to resolve 

Thanks!