In your first semester, did you have part time status according to your school?
Assuming so, it's a bit difficult to say. According to the official rules, you can be part time in one semester - but only in your last semester of studies. However what we have found in practice is that officers will often give a break to students as long as they only have one part time semester for the duration of their studies.
The best thing you can do at this point is make sure you remain a full time student for the rest of your studies. Make sure you have no more part time semesters (again, this is assuming you were classified as part time in your 1st semester).