You may find that dlvr.it is showing a post limit being reached before it seems that it should be.
dlvr.it systems work on a rolling 24-hour clock when it comes to posting limits. What this means is that a "day" is not defined as August 31 from midnight to 11:59 PM. A "day" is defined within dlvr.it as the previous 24 hours. What this means is that your update limit will be calculated based on the prior 24 hours. For example, if your update is performed at 9 AM PDT, we will check the posts made since 9 AM PDT the previous day. If you've made 10 posts during that time period and your post limit is 10 posts, we won't post any new items. If you've made 9 posts during that time, we will post 1 new item.