There is a limit of around 300 posts per feed. When a feed has more than that the oldest posts are being deleted. Could you please change it so that the oldest read posts are being deleted instead? I have feeds where some articles are longer and some of them are shorter. Usually I don't have much time and I leave longer articles for later and check shorter ones. In this case I'm way under 300 posts cap in my unread posts but the oldest unread are being deleted, because there are also read posts between which I don't care about.

The optimal solution would be to not delete posts at all, but if there is something that could improve current situation while keeping your optimization strategy I would say it is to change behavior of the removing posts if the posts count hits 300. Could you please change it?