I said I was done posting on this thread, I lied.. I am really surprised that this question is still being asked. This has been covered a million times. Yes, the items that bungie included in the default Sandbox are included in the overall object limit count. Basically if you delete the spawn points, items, weapons, objectives, vehicles, ect.. You loose them and they count towards the overall OLN for that map. it is really very simple to understand.
This is only partially true. The original items are a little annoying to work with but they're consistent in their bugginess. Check out the tutorial in my sig for more info on using the OLN objects
I just use the default sandbox map, and then usually money glitch all my items halfway through. I figured, what's the use in downloading a stacked sandbox if I won't be forging on the main floor anyways...(I either forge on the skybubble or crypt). But I usually run out of items like Dream, so I keep all the default items just in case. I really see no point in deleting them. That's just wasting extra items, and I want all I can get
So if you can't delete them, when you actually want to use them, do you just pick them up and move them to that spot, even though it's from the skybubble to the crypt?