Gaslo gauges....both showing the same

[Hymerbell]

I thought with Gaslo the first tank was used up first before switching to the secondary one....My gauges seem to show them both at the same level....that’s if the gauges are correct.....they are brand new so presumably they would work for a bit. I’ve got the big knob turned to point at the right bottle as the primary.

Also inside I have my control for putting heat in the GasLo bottle pipe and to show presumably which bottle is being used. I can’t get it to point to B.....it’s always on A...even if I switch off bottle A. Perhaps that now no longer works now I have refillable bottles....anyone a guru on Gaslo?