Notebook(s) Disappear / Missing

Notebook(s) Disappear / Missing

Firstly, new to Zoho notebook and using it for a week or so and loving it.

Great app!

I have the notebook app on my mac and currently it has 13 notebooks but when I launch the app, the main page only shows 11 / 13 in the window. There's 2 notebooks missing from the display.

What's strange is, when I search for them , I can find them but they don't appear when the app is launched.

While the iphone version of the app, shows all 13 notebooks. 

has anyone encountered this problem and resolved it?

thanks in advance.