Step to reproduce:
1. Run the program. In the "Route Planning System" menu, input 1 to choose "GetRoute". Then in the "GetRoute" menu, input 2 to choose "SearchByLeastTrans".
2. For "Please enter start station:", input Kowloon Tong.
3. For "Please enter end station:", input Airport.

Actual result:
Least Transfer Time:4
Route 1:
Kowloon Tong->(Take KTL Line to)Yau Ma Tei or Mong Kok or Prince Edward->(Take TWL Line to)Lai King->(Take TCL Line to)Hong Kong or Kowloon or Tsing Yi->(Take AEL Line to)Airport
Kowloon Tong->(Take EAL Line to)Hung Hom->(Take WRL Line to)Nam Cheong->(Take TCL Line to)Hong Kong or Kowloon or Tsing Yi->(Take AEL Line to)Airport

Expected result:
Least Transfer Time:4
Route 1:
Kowloon Tong->(Take KTL Line to)Yau Ma Tei or Mong Kok or Prince Edward->(Take TWL Line to)Lai King->(Take TCL Line to)Hong Kong or Kowloon or Tsing Yi->(Take AEL Line to)Airport
Route 2:
Kowloon Tong->(Take EAL Line to)Hung Hom->(Take WRL Line to)Nam Cheong->(Take TCL Line to)Hong Kong or Kowloon or Tsing Yi->(Take AEL Line to)Airport

I think the problem may be that you left the command printing the route label outside the loop.