Post Carousel – relative date not working right

Using the post carousel, when I set the relative dates, it won’t show posts that are older than 50 days, but it will show posts older than 100 days. Example – I set it to “from 100 days ago to 0 days ago” and it will show all posts from the past 50 days, and then posts older than 100 days ago, but not any posts between 50-100 days. I checked the posts made in that time period, and there is no reason why they shouldn’t show for this setting. It also seems faulty for posts older than 100 days to show for this setting… am I missing something? What is a solution for this?