1. Yes, you will lose weight, but keep in mind that this stack will also eat up your lean mass, so it will not be only fat that you will lose.
2. Yes, that is a possible side effect of such a stack, which is why it should not be used for fat loss.
Remember, these compounds were never meant for fat loss, and the dosages you need for fat loss are dangerous. They will cause a lot of side effects, and the results won't be the optimal ones. Therefore, it is best to use something that was at least created for the purpose of fat loss or recomp, such as Cardarine GW, which works great - it burns only fat, can increase lean mass, enhanced recovery and endurance, and has no side effects at all. So you make the choice here.