Haven't had any issue.. The only app that offers the med list is the smartphone app. Is that what you're using? Do you have enough room in the memory to add what you want to? If I think of anything else, I'll let you know.
I haven't had trouble either. Sometimes when an app acts crazy repeatedly, I close it. If it persists then I delete it and then reinstall. I have the app on my iPad n phone so if I delete app on one I don't loose my info.