Did I eat too many jelly beans or is this muscle?

OK....So I started Jillian Michael's 30 day Shred 2 weeks ago....And here's what happened:

Weigh in #1: Down .4 lbs and 2 whole percentage points in BF%
Weigh in #2: UP!! 2.4lbs and down 1 more percentage point in BF%

Total..increase of 2 lbs and a decrease of 3 percentage points in BF%.

I have been within my calories during this time, although I did have a jelly bean issue around Easter that I tried to count as much as I could. I do love myself some jelly beans.

Can I chock this up to additional muscle or do I need to flog myself for not counting enough of the jelly beans?

Thanks for the advice!