Well, there was a bunch of discussion around what to do with files where the Series name embedded in the filename included a year, like "Doctor Who (2005)". I thought it had all been sorted, but it appears that CARNAC could still do with some polishing.
For a start, it is taking the (1972) as the year of the program. I thought it had been agreed that if a year was included in brackets without a delimiter in the filename, such as a "-" or a comma, then the year would be included in the Series name. But it still isn't. So a file such as:
MASH (1972) - S03E24 - Playing Fair.mkv
Is still being interpreted as having a [Series] name of "Mash" (yes, MC changes the upper case to Title case), and is picking up the [Year] as "1972".
But with the above filename format, CARNAC does find the [Season] and [Episode] fields. That is because the filename format includes the Episode name and the delimiter "-" between segments, as far as I can tell and remember from discussions.
The filename:
MASH (1972) S03E24 Playing Fair.mkv
Only get the [Name] "Mash" and the [Year] 1972.
The filename:
MASH (1972), S03E24, Playing Fair.mkv
Also only get the [Name] "Mash" and the [Year] 1972. I would have expected that to work.
The filename:
MASH.(1972).S03E24.Playing Fair.mkv
Gets everything right. Well, almost. The [Series] is "Mash (1972)", [Name] is "Playing Fair", [Season] is "3", and [Episode] is "24".
With this file format and the resulting metadata from CARNAC, the 'Get Movie & TV Info" correctly finds the episode, and only the correct episode. One result is returned. (I made up the episode name, in case you were wondering.)
Note: My sample file did not have a Title tag inside it. That may change behaviour a little, as MC reads the Title tag into the [Name] field. With some MKV files this has been a problem, because rubbish was being saved to the Title tag by some software.
So basically, your filename doesn't have enough information or the correct format for CARNAC to work out what the file is, even though we can see plain as day. You will just have to do some post processing to fix things. Or rename your files before importing.