Thank you, moving the objects around the map worked in the end, but only in "Erase object mode". Pressing CTRL + left click in "Place object mode" will highlight the tiles in a purple colour, but no idea what that does. 
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Hi!:) Okay, let 's look over the issues.
It does indeed also work in "erase mode" to move objects, but it should let you move them in "Place object mode" too, in the exact same way, just drag the top-left tile of the object around the map and you should be able to move it too. But keep in mind that you need to be in "object" mode to move objects and in "NPC" mode to move NPCs.
The other thing, it is definetly "Place NPC Walk Area Mode". Are you sure you did not hit "W" button by mistake ? That opens that mode where you can set a path for NPCs to walk if you need that kind of implementation in your game. ( I added it because I actually use that for my game). For me it does not work -Pressing CTRL + left click in "Place object mode"- and that s why i think it s W pressed and opened "Place NPC Walk Area Mode" maybe.
But i would like to hear more, if this was not the case and it is indeed a bug on my end. I want to reproduce it to debug the issue and fix it.