Why do I add the staytime tag value in all the stacker output values not equal to the OffsetTravelLoaded tag value.
Thank you, @Yang H2, for the explanation. That makes the question much more clear.
As far as I can tell after some analysis of your model, I think that you need to adjust the Change Rule in the Statistics Collector (shown below) to be "Update" rather than "Change". The reason being is that there's a chance that two consecutive objects may have the exact same staytime. This is unlikely, but possible. To eliminate the possibility of this error in data collection, you should record the staytime on every update and not just in the case that the new value is different from the prior.
This worked for me. Hopefully it allows you to adjust your model accordingly and get the proper statistics.
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