When I use the json format as an output, the pagination / limitstart doesn't work. I always get the first items, even if limitstart is set to a higher number than the limit.
index.php?option=com_k2&view=itemlist&limit=10&limitstart=0&format=json
and
index.php?option=com_k2&view=itemlist&limit=10&limitstart=10&format=json
produce the same output.
The limit parameter though does work. I can't find what's wrong in view.json.php.
Using K2 v2.7.1 on Joomla 3.6.5