Log shows 1 post, but actually posts 4

I’ve been noticing that when this plugin sends an automatic post to my Twitter, it’s sending 4 of them at once. They are all different, but it’s all at the same time. I have my setting at 1 post at a time and the log shows only one at a time, but Twitter is getting 4. I don’t want that many at a time as it is flooding my followers with the same posts way too often. Can this be fixed?