recording midi into reaper

I know this is the Notion forum, and the problem I'm about to describe is in reaper, still since others use it as well, I hope someone can help me.
So if I connect N3 to reaper and I play my stuff back through it (with the midi-out ports), everything sounds fine. However if I record the same midi stuff in reaper and try to play it back the keyswitches don't always work, especialy on the fast stuff. It's as if reaper quantized it to the grid, so sometimes I have 3 keyswitch messages at the exact same moment (and the note as well), and only one of them applies then. I know notion sends it right, because it sounds ok if I just play it back (reaper still acting as the host), but it's not ok if I record it. In the recording options quantizing is turned off, so it shouldn't do that.
Any idea, anyone?
Thanks
So if I connect N3 to reaper and I play my stuff back through it (with the midi-out ports), everything sounds fine. However if I record the same midi stuff in reaper and try to play it back the keyswitches don't always work, especialy on the fast stuff. It's as if reaper quantized it to the grid, so sometimes I have 3 keyswitch messages at the exact same moment (and the note as well), and only one of them applies then. I know notion sends it right, because it sounds ok if I just play it back (reaper still acting as the host), but it's not ok if I record it. In the recording options quantizing is turned off, so it shouldn't do that.
Any idea, anyone?
Thanks