Twitter button doesn't allow more than 4 related accounts



I’ve searched the forum through and have a problem with related accounts. I use a twitter button ( on a website I’m developing and I am getting the tweet through, the page is correctly suggesting me the related accounts (2 at a time) that I’ve put in the link, but it only suggest the first 4 accounts. If I am subscribed to the first 4 accounts I only get a message that everything went well and the tweet has been added. I’ve checked this a couple of times, switched around the order of the related accounts that I’ve put in the link, checked with more accounts (I have 5 but I’ve checkd with more) and no matter what - it only allows to recommend the first 4 accounts.
Have you encountered a problem with this? Is there any known solution?