The first problem I'm assuming you're using gates in between maps?
Gates must use a valid map name for you to actually end up anywhere, you also need to have that actual map on your computer as well, maps that you can't even use gates to are the official maps so trying would be in vain.
If you made another map called Derplands but using the screen name Derpderp, you must still use Derplands as the gate destination. The screen name is the one showing up before you enter a portal, the other name is the actual name the game tries to load.
About the 2nd one I'm not sure, as far as I know FH doesn't have any object group called BLOPObjects from the start, chances are you got these from another map or map creator when you downloaded their map/s unless I'm off the trail.
If you go into C:\FeralHeart\media\objects
you should see different object groups along with the standard ones, there should be something called BLOPObjects there I believe, you should be able to delete this one without the game stop working and it wont be visable from within the map maker. But if a map uses this that you currently have in your exports there might be some issues with it, Just a thought though since I haven't seen it myself.