Hotspots being deleted

I have Pro version 1.1.1 with unlimited hotspots. Unfortunately they are limited! I cannot get it to keep more than 77 hotspots and I need 80.
I can enter the hotspot data and save them but after another save anything over 77 disappears.
The site is knucklascastle.org.uk/orchard

https://wordpress.org/plugins/draw-attention/