I will have a total of 7. Had my usual 4 yr undergrad plus a summer back home (2 total). Then it got really crazy when I was finishing my pre-req's after I graduated. Most JC's have a "county" of schools under one umbrella. Unfortunately, their transcripts are all different. Add those to going to another 4 yr university to prove I can handle "harder upper-div sci courses" and schools add up quickly.
Needless to say, getting transcripts for my app's was the hardest and most tedious part.
Forgot to add: most of the time, one campus will offer a class that another school doesn't have that semester. A year ago, I was going to San Fran State. and City College of SF at the same time. Hell, after my Biochem class at SFSU Monday morning, I drove straight to CCSF for my physics class. And when it comes to JC's, you are probably never there for more than 1-2 qtr's before you leave.