Answering the easiest question first: At my LTC facility on 3rd shift, the LPN charge nurses have 22 and 21 residents each on the rehab unit and 32 and 33 on the other side. So I'd say 1:16 is awesome! And is abnormal from my experience in 3 different LTC facilities.
I started orientation with an RN that had never worked in a LTC facility before whereas I had 2 years experience. After 2 weeks of orientation, I felt confident enough to learn as I go meaning its pretty much the same duties just different paper or different hands it may go through. The other RN, after a month and a half is still in orientation. Absolutely nothing against her for taking a bit longer than me. I had the experience, she didn't. I loved and appreciated the way she asked questions about "EVERYTHING" and was easy to point out flaws- which I'm sorry to say LTC has many.
I'm the RN Supervisor, so my duties are different in that, not only do I have my responsibilities as a supervisor (staffing, assignments, med destruction, creating the culture/attitude/pace of my shift, but I'm also responsible for delegating to others and receiving the cart to pass the 5am/6am meds. From your post I'm assuming your actually taking a cart and passing meds the entire shift? If so, remember you are responsible for that ENTIRE building! It's not really as overwhelming as it sounds IF:
You make absolutely sure you can trust your staff -if you can't document that you've taught them and you yourself must take up the slack for residents' sake until they are up to your standard and at the same time completing your supervisory duties. You must be able to do this with respect, ability to teach without being an ogre, have more energy than most, willing to do more than you ever thought you could do...because bottom line, it is all under your license.