Weka J48 decision tree help?

Hey all! Might be a long-shot but nothing ventured, nothing gained.

I'm pretty sure that I have a correct .arff file but once I try running the J48 decision tree in Weka it just... doesn't work properly. It only uses 2 of my 7 attributes to build the tree which is just plain weird. I've tried everything, looked everywhere but I just can't seem to find what's wrong? I really don't think it's coming from my .arff file so yeah, is there anyone with (relatively basic) knowledge of J48 trees on Weka? I literally just need to get the trees, I already know how to interpret them.

Thanks in advance!