>  Did you manually square these rectangles? 

no, as documented on https://wiki.openstreetmap.org/wiki/Mechanical_Edits/Mateusz_Konieczny_-_bot_account/fix_many_obvious_typos only tags replacements are done

I was looking into various reasons for this tags appearing but I have not realised how q suffix may be appearing. 

I will think how to handle previous values and future cases like this. If rate is low maybe I can just manually square new ones. Maybe try writing changeset comments where this happened?

I will look in attic data where I applied edit like this and square them when applicable. Will write here when I will do this or progress on this.