Hi there :)

apart from mcliquid's absolutely fitting remarks about not editing the whole world in one changeset here's my take on your work:

It looks like you go around the world fixing "issues" that the editor built into osm.org raises. These are warnings, that something *might* be wrong and you should only click the "fix" button the editor offers after *careful* consideration.
You created a lot of "layer=1" and "layer=2" tags that do not look right.

I would suggest the following:
Maybe stop the "fixing issues" work and map what's around you while also reading the wiki regarding everything you map. 
You could start with reading the articles on layer and level (see below) and improve your surroundings.

In the very likely case of questions coming up, please check in with the community at c.osm.org or any of the many chat groups.

happy mapping
silversurfer83

https://wiki.openstreetmap.org/wiki/Key:layer

https://wiki.openstreetmap.org/wiki/Key:level

https://wiki.openstreetmap.org/wiki/Contact_channels#Chats.2Fmessengers