Troubleshooting Google Agenda Tool Issues and Settings

also : does the Google Agenda tool work properly for you guys ? my agent keeps mixing up dates or ignoring days, are there any settings or further details to add in the instructions for using this tool ? some examples :

when asked to return the first upcoming event in the following days/week, it skipped Monday entirely, and returned only events for Tuesday
it confuses days and hours: returned September 23rd as Monday, a meeting occuring at 11:15 (when in my Agenda, it's logged at 12:15)

could it be linked to the timezone in the Dust settings ? or could it be related to the tool itself ? cheers