Zia CrossFit group ride and weight gain- muscle or fat?

My favorite bike ride is riding from the 599 rail runner stop south of Santa Fe New Mexico to the Sandia Rail runner in Albuquerque. I take highway 14 to route 66, then Route 66 to Tramway all the way down to the Rail runner station. That route is called Turquoise Trail, it's a famous stretch of road because of it's history and beauty. I haven't ridden that route in almost 2 years. I'm motivated to give it a shot now. I'm motivated because I'm finally losing weight, because of the fitness competition I'm in with fellow blogger "I suck at CrossFit", and also because I'd really like some of the people at my new gym Zia CrossFit to go with me. I really love the people Zia CrossFit. They're wonderful. They're supportive and a blast to be around. It's more like a big family than members of a gym. I'm trying to get as many of them to go with me as I can, I want to share the pain!

I weighed in this morning at almost 242 pounds. I was heartbroken. I've gradually been creeping back up from 239 a week ago. I've been working out a lot, eating 100% Paleo, I feel like I should be losing weight not gaining! In mid December I had measured 6 areas of my body in case something like this happened. I wanted to make sure if started gaining weight I had some way of being able to tell if it was fat or muscle. Here's the results:

+1/4 inch circumference arms
+ 3/8 inch circumference forearms
- 1/2 inch circumstance waist
- 1/4 inch circumference neck
-1/2 inch circumference thigh
+ 3 inches circumference of my chest and back!

Well, thankfully it looks like I'm losing in all the right areas and gaining in areas that is good to gain! A gain of 3 inches in my chest and back! That's pretty awesome!