Exiv2

Hello,
my example code uses the test.jpg from exiv2-0.23/msvc/test.jpg
If i try to delete the key "Exif.Image.Make", it will delete about 100 exif entries. This does not happen with another exif key!

image->readMetadata();
Exiv2::ExifData &exifData = image->exifData();
Exiv2::IptcData &iptcData = image->iptcData();
Exiv2::XmpData &xmpData = image->xmpData();
fprintf(stdout,"exif key %s\n", key.c_str());
fprintf(stdout,"exif type %s\n", metaType.c_str());
fprintf(stdout,"exif c1 %s\n", ToString(exifData.count()).c_str());fflush(stdout);
if (metaType == "exif") {
Exiv2::ExifKey exifKey = Exiv2::ExifKey(key);
Exiv2::ExifData::iterator pos = exifData.findKey(exifKey);
if (pos exifData.end()) {
fprintf(stdout,"Exif Key not found");
}
exifData.erase(pos);
} else if (metaType "iptc") {
Exiv2::IptcKey iptcKey = Exiv2::IptcKey(key);
Exiv2::IptcData::iterator pos = iptcData.findKey(iptcKey);
if (pos iptcData.end()) {
fprintf(stdout,"Iptc Key not found");
}
iptcData.erase(pos);
}if (metaType "xmp") {
Exiv2::XmpKey xmpKey = Exiv2::XmpKey(key);
Exiv2::XmpData::iterator pos = xmpData.findKey(xmpKey);
if (pos == xmpData.end()) {
fprintf(stdout,"Xmp Key not found");
}
xmpData.erase(pos);
}
fprintf(stdout,"exif c2 %s\n", ToString(exifData.count()).c_str());fflush(stdout);
image->setExifData(exifData);
image->setIptcData(iptcData);
image->setXmpData(xmpData);
image->writeMetadata();

image->readMetadata();
Exiv2::ExifData &exifData3 = image->exifData();
fprintf(stdout,"exif c22 %s\n", ToString(exifData3.count()).c_str());fflush(stdout);

The output in std::out is:
exif key Exif.Image.Make
exif type exif
exif c1 155
exif c2 154
exif c22 49