DSK HQ Instruments problems

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Hello,
I have used some DSK VSTs in LMMS and they worked great.
Today I bought DSK HQ Instruments which comes in the
form of soundfont (.sf2) files.
I have tried flute, viola, eletric piano, and some saxophones.
Here is the odd thing: I have a track where there are two sixteenth notes
in a row. and most of the instruments ignore the second sizteenth note.
There is a patch called "staccato flute" that does play both sixteenth
notes, but it does not sound very good, because the attack is so slow.

I have used other soundfont files in LMMS, and not had this problem

Has anyone else tried DSK HQ Instruments, and experienced anything like this?
Thank you.
Now I am noticing this same strange behavior with another soundfont file.
When there are two of the same note (for instance two Cs) following each other,
with no piano roll space (rest) in between, LMMS plays the first note, but makes it
last for the time duration of the two notes put together.

In my original question, I thought it had to do with the duration (two sixteenth notes),
but it is actually doing it whenever the same note is repeated with no space in
between, no matter what the duration. Is there any L:MMS setting which could
affect (or fix!) this behavior?

I am using LMMS 1.1.3 and 1.1.90, 64 bit, on Windows 7. I also
have 1.1.3 on a Linux machine; today I'm going to see if I get the
same behavior on Linux.

Thanks
I have no experience with dsk-sf at all, so i would not know if the problem lies in the files or in lmms :)
If any, could you link to one of the free sf that you have this problem with?
Thanks for your answer.

The free soundfont file that LMMS stumbles on in the same way is called
MuseScore_Orchestra_GM.sf2
but I have not yet been able to find from which wesite I got it. Still looking.

I moved my project over to Linux (KXStudio 14.04). I am running LMMS 1.1.3.
On Linux, the soundfonts do not have the same problem: when there are two of the
same notes in a row, no matter how long they are, it plays them as distinct notes.

However, the Linux version of LMMS will not run any VST instruments.
I thought KXStudio came with Wine; it does not seem to have it, so I'm
installing it, and then will see if it helps with the VST problem.