1. This was how the functionality was described in the requirements

It probably wasn’t like that in the requirements. He either didn’t read the requirements or he was drunk (or both).

2. I have no problems with flexible hours

What the web developer means by this is that he has no trouble staying up till 4 AM playing Counter Strike. Work doesn’t necessarily come into this picture.

3. I could probably have this up and running within a day

He probably could, but it won’t work. If you get a breakdown from a web developer feel free to thank him and triple the hours he has given you for the actual planning. It’s not their fault, it’s just how they roll.

4. I’ll start on the documentation when development is finished

He won’t. Documentation is a pain for developers, they will have to write actual words (which can’t be generated by a script). You either get him to do the documentation at gun point or you won’t get any at all.

5. Development will be finished this week

Now, there’s a small chance this isn’t a lie. It depends on how many times you have heard this line before. Around the 3rd or 4th time it could be true. Most of the time it’s not.