Doing some guess work, but I'm guessing this is air experience for multi-engine CPL?
See
FAR Part 61 Sec. 61.129 effective as of 10/20/2009
(iii) One 2-hour cross country flight in a multiengine airplane in daytime conditions that consists of a total straight-line distance of more than 100 nautical miles from the original point of departure;
(iv) One 2-hour cross country flight in a multiengine airplane in nighttime conditions that consists of a total straight-line distance of more than 100 nautical miles from the original point of departure;
Therefore the only issue I can see was if your journey was A -> B -> A. If so, if you can get back from B to A in less than 100nm, B must be less than 100nm from A so you don't meet the requirement?