Hi,
Avast Mobile Security is primarily a consumer-oriented product, and as such, things are optimized for typical consumers... with just a few devices that need to be managed.
With 120 devices, I'm assuming you're a business user.
We're planning a more complete, more scalable version of AMS specifically designed for business users sometime next year.
In that version, the number of devices would not be limited (only by your license, of course) and also, the presentation of the list of devices would be much better suited to larger quantities.
Thanks
Vlk