Strange behaviour of refueling stop

[Ligo]

I create a route from the USA to central Asia with a refueling stop in the United Kingdom (A-B-C-B-A). Total range is 6000 nm and distance between A-B is 3600 nm and B-C - 2400 nm. I use Boeing 747-200 for that with 325 pax payload and nominal range 4540 nm. But...
When I create the route I get the system message that

"This aircraft type may not be able to fly this route with full passenger load.
Boeing 747-200: Limited to 119 pax by payload/range."

What am I doing wrong? Or is it a game bug?

[Frederik]

two possibilities
1. do you have technical stops in both directions?
2. what is the runway length of you intermediate stop?

[Ligo]

Thank You for questions:)
The problem was that I did'nt add the technical stop on the back way. It is not so obvious after making point-to-point routes.
It seems I was the one who did'nt catch how to make such routes because I didn't find any threads about it on the forum:))