Check your MIDI assignments in both the Continuum Editor and KymaConnect. You should have but a single MIDI connection between the Continuum and your Paca(rana). If you have more than one then the Paca(rana) receives each MIDI message multiple times. This can cause missed notes or "hung" notes.
The Continuum Editor provides a MIDI connection "slot" named "Kyma". If you assign this to KymaConnect's "vPacarana" virtual MIDI port then the Paca(rana) is receiving MIDI from the Continuum. No other MIDI connection is needed between the Continuum and the Paca(rana). In particular, you should not also assign the Continuum's physical MIDI interface (usually the Mio interface) to a KymaConnect EXT MIDI slot. If you do then the Paca(rana) will receive the Continuum's MIDI twice.
The alternative way to connect the Continuum to the Paca(rana) is to assign the Continuum's MIDI port to one of KymaConnect's EXT MIDI slots. This automatically sends MIDI from the Continuum to the Paca(rana). However if you choose to use this set up it is essential that you leave the Continuum Editor's "Kyma" MIDI slot unassigned.
Connecting through the Continuum Editor is the simpler configuration but it does require that you always have the Continuum Editor running when you are using the Continuum with Kyma. If you use the alternative of connecting only through KymaConnect's EXT MIDI slot then you can play a Kyma sound from the Continuum even when the Continuum Editor is not running.
This subject is discussed in more detail in this blog post: http://drk.delora.com/musings_blog/?post_id=614&title=what-is-the-best-way-to-connect-the-continuum-fingerboard-with-kymaconnect