Hi. Yes, they are very strange. But I just corrected geometry. Anyway, I'll check these ways at place next year.

It was an mistake. I've corrected this.

addr:street должен быть такой же как и name самой улицы, иначе поиск в навигаторах работать не будет

Яндекс-панорамы порядком устарели. На Пушкарской знак стоит здесь https://dl.dropboxusercontent.com/u/4624786/osm/FILE0317.JPG
поэтому просьба убрать oneway с участка до знака.

Hi. No, it was not discussed in Canadian community. I tagged Ontario with coastline because all other great lakes are tagged the same way and because there was an issue with OsmAnd. Anyway, this issue is solved another way so you are free to remove these tags.

Sorry about that. Russian wiki does not mention it. I'm trying to fix that http://jira.osmand.net:8085/browse/AND-203
I noticed that ALL great lakes except Ontation tagged with natural=coastline. I think that it is the cause.