In task board, changing the # of cards displayed, causes all Jira issue #s in ToDo column to show as "resolved", until you click "refresh" in greenhopper

In the task board, if I click user preferences icon and change the # of cards/column to a different number, and then click "save and apply" then "close" - all of cards in the "To Do" column show a strikethrough line through the number, as if the Jira issues were resolved/closed (and of course in the ToDo column they all are open) Clicking "rehresh" in the taskboard (upper right corner) clears the strikethrough lines which makes them look nornmal.

Tip: If I do not click "close" in the user preferences after clicking "save and apply", I cannot get the strikethrough lines to be cleared, even by clicking refresh. I must click "close" 1st and then "refresh"

This is causing our new teams a bunch of confusion - would be nice to get a fix.