it is normal to find things. I still do find things every now and then. I seem to always come home with a few things on a list (as with my last trailer) when I dewinterize I will go through and check plumbing connections and screws on the cabinets and various nuts and bolts.
most important on a new camper is check the lug nuts as stated in the manual and on the stickers on the camper. also just go through and make sure all is hand tight on the plumbing. I had a few connections that were loose. no big deal all part of ownership.
ours came with a TP holder but it was not installed- I prefer to use 2 fingers, the middle and index to hold the roll