Slicer is not working properly

Can you post some screen shots? And maybe your data model relationships or is this all one table?

I have a single table, 2 slicers. I select "February" from the first slicer, my second slicer only shows dates in February. I select a date in February from the second slicer, my data is correct and the option "January" disappears from my first slicer. I deselect the date in my second slicer, my first slicer still has "February" selected but the option January shows back up. This all seems correct to me.