Two stories from a local RKKA cementary

[Al-muell]

This one may seem simple... if You live in former USSR or in the West and have an acces to certain books.
This are things I have noticed before, but I was unable to find any detialed info on it.
Here's the first story:
There is a grave on the RKKA officers' cementary here in Wrocław that differs from others.
It is surrounded by anonymous graves ("oficier krasnoy armii"), but it has an unusual metal plaque attached on standard marble one (covering it compleately). I am sure this plaque swoned up after 1987, and probably in late 90. (it looked quite new, and the whole grave seemed well kept in 1999 and seems to be a bit neglected now). So I think he was i8dentified long after the war (And there wasn't even an exhumation!!). To make it more weird the plaque says he is (was) a HSU (awarded in 90.!?).
Here's all I know on him: ml. lieitienant Aleksandr A. Nazarow born 15.03.1926, died 7.02.1945.
Can Anyone find the info on him? And when did he got HSU (posthumously?)?

And the second - easier:
He is even mentioned in some works on the siege of "Festung Breslau" that I found, but there's no info on what he did (apart from the fact that he "died in an air fight").
Double HSU Ivan S. Połbin
27.01.1905-11.02.1945.
same question.
Thanks in advance.