disagreeing chess engines

if you play a bot on "friendly", you get hints and evaluation. but sometimes these disagree, and hints might even be evaluated as blunders! game review sometimes also gives different results. does this happen to anyone else? any thoughts? 

No it doesnt happen to me but i think you should let the engine work for few seconds and see the results.  

I'm not very familiar with the chess.com play vs. computer aspect, but the computer analysis after a game (using the chess.com analysis board) is a surefire way of an accurate evaluation. Perhaps a move winning a rook would count as a "blunder" because there is some obscure tactic where you could win a queen, and the computer crunches those numbers and decide you have made a blunder.

thank you for your advice, but this isn't about me making poor moves,(though I do) it's that the computers give different results.

I read once the free bot coach only calculates out to X moves or so. Diamond membership gets a deeper more accurate analysis. My favorite mis-analysis was when it said "good job on discovering" something I had deliberately set up for the last 10 moves.