GroupDocs.Search finds some documents with "content = x", but also with "content != x"

Hello,

We found a problem: Based on 1000 files, we found out that GroupDocs finds 4 of them when you search for “alex” in the index, but also when you execute a “NOT alex” search in it. That does not seem to make sense.

Would it be possible by the way to increase the upload limit for this account on this forum?
I had to remove 000559.ppt, because it was too large.

The 3 (4th was to large to upload) files are in the zip file, together with a repro project.

repro.zip (2.7 MB)

By the way: You told us that you are currently indexing the Corpora dataset. This is a good way to verify that it’s solved in general (Create an index with 100k of its files and search for “test” and for “NOT test” and make sure that the number of results from both searches add up to exactly 100k).

Best regards
Jam

Hello!
This is because 4 documents and several more nested items are added.
If you display indexed documents:

var docs = index.GetIndexedDocuments();
int i = 0;
foreach (var doc in docs)
{
	Console.WriteLine((i++).ToString() + " - " + doc);
	var items = index.GetIndexedDocumentItems(doc);
	foreach (var item in items)
	{
		Console.WriteLine("\t" + (i++).ToString() + " - " + item);
	}
}

The result will be:

0 - E:\Issues\SEARCHNET-3616\repro\input_files\000133.ppt
        1 - E:\Issues\SEARCHNET-3616\repro\input_files\000133.ppt\Object 4.doc
        2 - E:\Issues\SEARCHNET-3616\repro\input_files\000133.ppt\Object 4 (1).doc
3 - E:\Issues\SEARCHNET-3616\repro\input_files\001020.ppt
        4 - E:\Issues\SEARCHNET-3616\repro\input_files\001020.ppt\Object 8.bin
5 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps
        6 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 2.jpg
        7 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 2 (1).jpg
        8 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 2 (2).jpg
        9 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 2 (3).jpg
        10 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 3.jpg
        11 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 4.jpg
        12 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 5.jpg
        13 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 2 (4).jpg
        14 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 3 (1).jpg
        15 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 3 (2).jpg
        16 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 3 (3).jpg
        17 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 4 (1).jpg
        18 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 4.bin
        19 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 7.bin
        20 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 3 (4).jpg
        21 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 3 (5).jpg
        22 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 4 (2).jpg
        23 - E:\Issues\SEARCHNET-3616\repro\input_files\001052.pps\Object 5 (1).jpg