GameMaker multiple and overlapping collision objects

I want to have multiple overlapping collision objects on a single instances layer which are programed to collide with a player object... Would this disturb anything or cause a problem?
thx

Edit: I also wanted to note that although my question may seem overly simple, I'm not a programmer... Sometimes I ask these type of questions so that I can better design assets/game layouts for the actual programmer. Help and feedback is always appreciated on this end. :)
 
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