Hi and welcome to OSM!
Thanks for editing, but unfortunately in one case you converted a while residential road into a gate. And in another case you created a duplicate road on top of existing road.
(I went ahead and fixed those issues)

If part of a road needs to get distinct information then you can select one of its nodes, right clicking on it and then selecting 'split'.

I suggest completing the Walkthough in the help section.

Also as a side note. Making road private acces is only possible when there is a gate or no trespassing sign.

Cheers