Agreed - the way TinderBox calculates the bins esp. for dates and integer values is not optimal. Here a post some time ago on the issue in this forum. I’m hoping this part of Crosstabs can be improved in future updates.
In the meantime have you tried setting the number of bins for the column/rows ? Clicking on the Row or Column field you can set the number of bins to unlimited as below and play with the setting. @eastgate could have to comment on how the bins are calculated and why your bin sizes of years vary.
