Help Jorte event problem

[chompyrud]

Hi there, I've been using Jorte now for a few years and its been great but it's developed a problem over the last couple of weeks and I wondered if anyone else had the same thing going on. Basically when i set an event it adds into the calendar fine - but i change a lot of the dates for these events to put them on a different day (i.e I postpone an event) but when i go into the event and click to edit it and change the date it moves to the new date which is fine but within 15mins or so the original entry reappears on the original date as well as the new dated version (so i have 2 of the same events on different days) It never used to do this (it used to just change to the new date) but does it all the time now and I don't know why - i've checked all settings and uninstalled and reinstalled but it still does it - I have it set with gmail calendar as the default and have jorte on both my galaxy s3 and my asus transformer if that may be the cause of any problem. If I edit the event on google calendar in a web browser it changes to the new date fine - its just when i use jorte. Anyone have any ideas?