what your talking about actually isn't software but the random number generator. Actually, sites aren't rigged, the truth is, KK beats AA 19% of the time. That means you could get AA twice, and lose to KK both times, and it wouldn't be astronomically unreasonable. Horrible players who put in limited hands (i'll assume like yourself) continually fail to grasp this simple concept
Also, the actual software on both these sites is subpar. Bovada in particular is about as bad as it gets, with HUDS being illegal, anonymous players, and a 4 table max. At least carbon enables you to play more tables.
Just my 2 cents