(25 Aug 2015, 2:54 pm)Michael wrote Well i'm going by the post although 2 normally run together - sometimes.
"Normally" and "sometimes" contradict each other, Michael!
It's certainly not "normal" outside of peak times but irregular variable (often unforeseeable) delays can and do happen, and, as we have discussed in the past with regards to delayed frequent services, this results in services bunching up.