Keep in mind that overlapping at offset doesn't take into account over-shooting (i.e. if your player object has a collision poly less than 100 pixels wide, it's possible that it will think it's not overlapping when you're really close.
You may be better off testing for x coordinates if that is the case ( player.x > object.x - 100 OR player.x < object.x + 100 ).
Otherwise, you would have to use an OR block (which means you might need to nest it if there are other conditions in the block)
If overlap is what you're looking for, this is what you would use:
if overlapping at offset x - 100 OR overlapping at offset x + 100