That is how my brew started, it bubbled for about 2 days and yes it was ever so slight. I was expecting some big continous farting from it but it never did. My Carboy also did have that build up on the bottom and from what I have seen that is also normal.
I just happened to also get my 5 gallon...
Good Detail, oddly enough I just brewed that same kit just over 1month ago. I got to drink it the other day and I was pleasantly surprised it tasted good (only because lots of people say their first brew tasted bad). I also happened to leave out the Chestnuts but I added Pistachios to it since...