First month you will for for free in case if they just don't like you. Moreover, the trial period may be extended without explanation and you can be fined without any reason. A very bad opinion of the CEO remains.
There are a lot of things to stop you working here:
You must evaluate your tasks (in hours), even if you are only two days on the project.
You are not involved in planning at all. That's why they miss all the deadline.