It is my understanding that in some states, an LPN can delegate to an RN in a "charge" capacity, meaning for instance, a patient assignment, however can not DIRECT an RN clinically. LPN's scopes can sometimes and are vauge depending on the state the LPN is licensed in, but most are clear in the DIRECTING and not the DELEGATING. Depends on the state, depends on the facility policy, depends on a number of things.
Clearly in an acute care setting, an LPN's scope is limited, but usually due to facility policy rather than scope issues. There are many LPN's who are DON, ADON, and charge nurses in nursing homes and skilled care. Those facilities also have RN's working as well. It is a rumor that circulates time and again that an LPN works "under" the license of the RN. That is absolutely not true. LPN's work under their own licenses, and are responsible for the same. It is unlicensed personnel that one delegates to that could be a "held responsible" for or "working under one's license" issue. Again, states vary widely. There are also LPN's who work under the direction of MD's. In other words, OP, you are responsible for what you do clinically, can--if provided for in your scope--administratively act as a "charge" nurse, give assignments to RN's--but what you can't do is to tell the RN how to care for the patient assigned to him/her.
OP, it is difficult to try and change someone's understanding of your role and scope. Make sure you are well aware of what your scope is, and look at your practice act on the BON website for your state, and be mindful of the policy in your company.
I would think that you were given a "primary" role due to your experience as a nurse. Your years as a CNA, although may have prepared you for some of the aspects of home care, would not have been a deciding factor--as that is comparing apples to oranges.
I would also have conversation with your supervisor. Ask for the policy regarding your role in the team for their agency/facility.
And as a complete aside, be sure that you have malpractice insurance
of your own. Just good practice.