The app shows that I have two chat notifications and when I log in I can't see them

If you see a blue circle 🔵 with the number "2", this is the default screen that appears when your chat-box is still empty to show you as an example: 

Chat empty

When you receive a message you will see the message and the name of the employer, and you will see a red circle 🔴 notification on the chats tab below 💬