Problem with multiple Ambient Sounds

Hello everyone. I’m trying to have a landscape with multiple ambient sounds that I made creating cues from wav files, so as the character moves, it will gradually change. The problem is that it doesn’t work well. I have 3 ambient sounds, 2 on the left part of the map, and 1 in the right (see the picture). If my player appears on the left, both sounds play at the time (I want that), but if I move forward I never hear the other sound, even if the character is in the source. If my character appears on the left, I hear the sound of the left, but if I move to the right, I can’t hear any of the sounds. Maybe there shouldn’t be more than 1 ambient sounds per level? Hope you can help me. Thanks.