Also, don't forget, you can lose fat and gain muscle but show no change on the scale.
The use of "weight" as a measure of progress works best at the beginning of the fat loss process, but breaks down later as you start to get leaner.
As for the conflicting advice, it is muscle mass that has a large effect on your metabolism -- so having more of it makes it easier to lean down. However, it can be hard to gain muscle without eating excess calories when you've been training for a while. So, nothing definitive, but it is simply up to you to decide on your goals, long term or short term, and set your diet and workout plans accordingly.
You may also want to look into using something like high intensity interval training for your cardio. The idea is that the high intensity causes your metabolism to stay elevated longer than normal cardio, thereby burning more calories in the long run. This is similar to lifting weights, in that the muscle trauma causes you to burn calories in muscle recovery.
I hope that helped instead of lead to more confusion. Take the time to find the articles on the site and read up on all of this... it will only help. In the short term... keep on working out and eating well... and don't give up if the scale lies to you and says you aren't progressing.