7zip changes file time

I have a file;
Code:
c:\users\jlc\utils>dir "ScrapBook 18 Jan 2018.fpr"

 Volume in drive C is WINDOWS      Serial number is d4d0:ce4e
 Directory of  C:\Users\jlc\utils\ScrapBook 18 Jan 2018.fpr

 1/18/2018  11:50         747,466  ScrapBook 18 Jan 2018.fpr
             747,466 bytes in 1 file and 0 dirs    749,568 bytes allocated
     655,238,807,552 bytes free
..on which I use 7ZIP;
Code:
c:\users\jlc\utils>7ZIP /P Scrapbook "ScrapBook 18 Jan 2018.fpr"
<= C:\Users\jlc\utils\ScrapBook 18 Jan 2018.fpr
  100 %
...when I take a look inside the .7z, it has a different file time;
Code:
c:\users\jlc\utils>7zip /v Scrapbook.7z
2018-01-18  06:50        747,466 ScrapBook 18 Jan 2018.fpr
...than the time the file was created;
Code:
c:\users\jlc\utils>dir Scrapbook.7z

 Volume in drive C is WINDOWS      Serial number is d4d0:ce4e
 Directory of  C:\Users\jlc\utils\Scrapbook.7z

 1/18/2018  11:52         746,533  Scrapbook.7z
             746,533 bytes in 1 file and 0 dirs    749,568 bytes allocated
     655,238,115,328 bytes free
7zip is an internal command;
Code:
c:\users\jlc\utils>which 7zip
7zip is an internal command

c:\users\jlc\utils>ver

TCC  22.00.33 x64   Windows 7 [Version 6.1.7601]
When I delete the original file;
Code:
c:\users\jlc\utils>del "ScrapBook 18 Jan 2018.fpr"
Deleting C:\Users\jlc\utils\ScrapBook 18 Jan 2018.fpr
     1 file deleted              749,568 bytes freed
...unzip the .7z file;
Code:
c:\users\jlc\utils>7unzip Scrapbook.7z
=> C:\Users\jlc\utils\ScrapBook 18 Jan 2018.fpr
...it is back to the correct time.
Code:
c:\users\jlc\utils>dir "ScrapBook 18 Jan 2018.fpr"

 Volume in drive C is WINDOWS      Serial number is d4d0:ce4e
 Directory of  C:\Users\jlc\utils\ScrapBook 18 Jan 2018.fpr

 1/18/2018  11:50         747,466  ScrapBook 18 Jan 2018.fpr
             747,466 bytes in 1 file and 0 dirs    749,568 bytes allocated
     655,237,509,120 bytes free
Why is this?

Joe
 
May 20, 2008
9,146
58
Syracuse, NY, USA
UTC vs local time?
It seems that difference is wrongly applied.
Code:
v:\> filetimes testfile
Created:  2018-01-19 13:00:00
Accessed: 2018-01-19 12:00:00
Modified: 2018-01-19 14:00:00   <=========== local

v:\> filetimes testfile /u
Created:  2018-01-19 18:00:00
Accessed: 2018-01-19 17:00:00
Modified: 2018-01-19 19:00:00  <=========== UTC

v:\> 7zip /p testfile testfile
<= V:\testfile
  0 %

v:\> 7zip /v testfile.7z
2018-01-19  09:00              0 testfile  <======== ???

v:\> del testfile
Deleting V:\testfile
     1 file deleted

v:\> 7unzip testfile.7z
=> V:\testfile

v:\> filetimes testfile
Created:  2018-01-19 14:00:00
Accessed: 2018-01-19 14:00:00
Modified: 2018-01-19 14:00:00   <=========== local

v:\> filetimes testfile /u
Created:  2018-01-19 19:00:00
Accessed: 2018-01-19 19:00:00
Modified: 2018-01-19 19:00:00  <=========== UTC
 
May 20, 2008
9,146
58
Syracuse, NY, USA
7za.exe gives local times.
Code:
v:\> u:\7za.exe l testfile.7z
   Date      Time    Attr         Size   Compressed  Name
------------------- ----- ------------ ------------  ------------------------
2018-01-19 14:00:00 ....A            0            0  testfile
------------------- ----- ------------ ------------  ------------------------