Deck question, can I leave the structure like this?

[Chris Iley]

This is a flip property. The deck had some very rough looking boards so we decided to just put in new decking and railing. But I have some concerns with the way the beam and posts are connected. I feel like that’s a common mistake but now that I have the decking pulled off am I responsible to fix it? Also, the deck is not attached to the house,is that an issue as well?