Добрый день, спасибо за уточнение. Вы правы, в данном случае правка была неполной, теперь здания разделены.

Добрый день! Данные из osm используются на одной интернет площадке, а я вношу адреса компаний, которые там размещаются. Эти компании предоставляют информацию о себе, т.е. информация из первых рук.

addr2: housenumber was added because it is so recommended in the article:
osm.wiki/Proposed_Features/addrN
With a deeper study and thanks to state data, in this case it is possible to divide the buildings into 2 parts and assign each one its address.
On the cadastral map it is noted that parts of the building are built on different land plots. And one part of the building is built later in time.
http://pkk5.rosreestr.ru/#x=15033623.259487027&y=6187908.491131548&z=20&text=27%3A23%3A0020340%3A95&type=1&app=search&opened=1
Therefore, in this case, I think the building can be divided. In this case, the use of addr2 is not required

Hello! Thx for your watching to my work, together we build osm better.
Yes, this building has two addresses.On this house there are 2 nameplates with the address and people associate this house with one and the other address. The house is located at the intersection of streets.

Hmm, about this problem: what are you advise?