Not all interviewers know what they are doing.

Interviewing is not an easy task and not all people conducting interviews will come across as well as others.

Its easy to get turned off during an interview if the interviewer shows up late and doesnt seem to care, doesnt appear to have read your resume in advance or worse, if they forget they are even doing the interview with you and are surprised when you show up!

Ive seen this happen before.

Sometimes, events that occur during the interview can leave you with a bad impression of the company and can cause you to question whether or not you want to work for them.

The important part is to put the events in context. In the examples I gave above, perhaps the interviewer has been very busy and simply made a mistake not preparing enough for your interview with them. Thats not a good excuse, but keep this in mind.

Plus, if the interviewer is not the person youd be working for (ie. they arent the hiring manager) remember that you may have little to no regular contact with this person if you were hired. Its the hiring manager who you want to pay particular attention to since youll actually be working for that person.

The thing to remember with an interview is that its a two-way street:

Youre trying to sell yourself to the employer.

The employer should be trying to sell themselves to you, too.

Dont make a mountain out of a molehill but dont ignore obvious signs that lead you to believe that the company you are interviewing with has problems that you should be aware of when considering whether or not you want to work for them.