I noticed the warning on the main page about the removal of adjustable inserters but I can't remember if that was there before i downloaded my current version, is that current version only or? And if it is does anyone have information on the reasoning behind the removal?

Somewhere in 0.13 there was a migration from my custom long and non-standard inserters. that's what the warning is about. if you have that warning, there's a good chance that every inserter in your game that was from the previous versions of my mod just became a standard reach inserter.