Just to update you then....
As noted with SPMC I have had zero problems with the icon.
When I used Kodi I had to do the llama trick etc to get an icon.
After doing what I did with SPMC I removed Kodi and llama and have just used SPMC.
I side loaded Astro file manager and ES file manager, after "buying" them for free at the Amazon store and their icon showed up fine.
This is the interesting bit....
I then decided to install the latest 14.2 beta Kodi (it will install completely separate to SPMC, after now seeing it in the App store at Amazon. The App was "bought" and the Kodi was side loaded.
The result - NO icon at all.
Nothing that I did would get the icon....!!!!
So I then de-registered the AFTV from Amazon. I then re-registered it and then synchronised the apps.
Then voilà the Kodi icon turned up on the recent tab along with the others noted...!!!
Just thought that I would mention the above in case it would be helpful to you....?