No, it does not happen often but it does happen. It has happened to me more than one time, not just on Fusion Cash, but on other sites as well.
Surveys are a hit or a miss. Because you got the one cent credit, it might mean that the survey was closed by the time that you got close to finishing it or you were over quota by the end. It might not be a glitch although glitches happen. It is also possible to make a mistake when taking a survey and contradict yourself during the survey getting kicked out. You can also get kicked out for going too fast.
When taking a survey, take your time and read each question carefully. Answer honestly. When you get the congratulations page, leave it open for a few minutes, checking your account to see if you have yet received credit.
I have been with FC several yers and love the site. It is not a perfect site but it is one of the best of its kind.
Welcome.