Sorry for the inconvenience caused.
We have already found and fixed the mentioned issue with ScheduleCellTapped event triggered several times in SfSchedule Xamarin (Android). This fix will be included in our main release 1 which is estimated to rollout in the next week. We have prepared a simple sample for this. Please find the sample along with custom assemblies in the below link.
Sample with Custom assemblies: ScheduleTappedSample
If the provided solution does not meet your requirement, could you please modify the provided sample along with replication procedure (if possible)? It will be helpful for us to analyze on it and provide you a possible solution.
As informed earlier, we will update you once the volume 1, 2016 release rolled out. We appreciate your patience until then.
Please let us know, if you have any query.
We are glad to announce that our Essential Studio Volume 1, 2016 is rolled out and is available for download under the following link.