Hi ! Your JS script might cause some problems but we will see when the cross-posting happens.
The problem is that you didn't put the hashtag #share2steem in your tweet (you put share2steem without the hashtag). That's why it didn't cross-post.
If you want you have an option (Go on the website, Social Networks tab, click on your social network account), at the end you will have the choice between posting Tweets with the hashtag or all tweets - even without the hashtag - this change needs an hour to be effective.
RE: Share2Steem Fundition update 3 : backend optimization, delegations to new users and team presentation