Shared User Device Limit

Ok, so prime day came and went and I might have gotten a little overzealous. Lol. Purchased the Ring alarm to phase out our current alarm system. Just can’t beat Rings price. Also purchased 9 various cameras (floodlight, spotlight, stickup) to supplement out two ring doorbells. Tried adding my wife as a shared user and it will not let me add more then seven devices. Like the first seven are all I have options to add. If I take a device offline, then re-add it, it rotates off the list of ones I can add. We both have newer iPhones. Tried making a new account for her - same problem. Spent two hours on phone with tech support and they can’t figure it out either. Tech support was great, but advanced tech support never calls back when they say they will. Anyways, they figure it is likely a problem with the programming in the app. Anyone else have similar experiences, or I am one of the few who go a little crazy on Prime Day?