Bread making machine problems?

I have recently purchased a Silvercrest breadmaking machine from Lidl's and followed the recipes exactly as printed. The first loaf was OK. After this one and following exactly as before the loaf rose too much and then collapsed. I have now made about seven loaves altering the recipe and still the loaf rises too much and then collapses. By altering the recipe I have lessened the amount of yeast, added extra salt, used extra water and used less water. They just rise to the top and then flop. Any ideas? Also the programmes are too long and I have discovered to stop the machine about ten minutes before the official finishing time because the loaf burns. I have spoken to friends who have other makes and their machines are not as powerful as the Silvercrest which is 850 watts, and I was wandering if this has anything to do with the dough rising too fast and obviously burning the finished product? I am using programme 2 making a French Classic white bread.