fix small issue: switching between overlap and non-overlap graphs should change the $existOverlap variable accordingly (true/false)
fix small issue: switching between overlap and non-overlap graphs should change the $existOverlap variable accordingly (true/false)

PSU-CAPSTONE-BEEEEEES/Tellagence,PSU-CAPSTONE-BEEEEEES/Tellagence,PSU-CAPSTONE-BEEEEEES/Tellagence,PSU-CAPSTONE-BEEEEEES/Tellagence