I'm not sure what is going on with the first file, but with the second this change is probably the answer:
25.0.74 (7/8/2019)
1. Changed: When doing a movie lookup, the year will be stripped from the name if the movie is named like [Name] ([Year]).
Assuming that you are using that version or later. But that would only strip the year if MC thought you were importing a movie, I believe. It does that when it tries to look the movie up online, to gather metadata.
If you put your Home Videos into a specific folder, rather than in amongst other video types (movies, TV shows), then try configuring Auto Import for your Home Videos folder to set the [Media Sub Type] field to "Home Video". That may change the way the CARNAC (see Wiki) function interprets the file name. That should at least stop the year being stripped from the second file. See if it fixes the other issue as well.
If not, you tag all Home Video files in Auto Import with a rule such as;
[Name]=filename([Filename (name)],0)
Which should remove the file name extension from the filename and save that as the [Name] field/tag.
https://wiki.jriver.com/index.php/Carnachttps://wiki.jriver.com/index.php/File_Path_and_Identifier_Functions#FileNamehttps://wiki.jriver.com/index.php/Auto-Importhttps://wiki.jriver.com/index.php/Tag_on_Import