The only reason I can think of would be either a detachment of another squadron for exercises or a temporary posting whilst work, such as runway resurfacing, was done at another base.
Certainly none of the squadrons you list flew Javelins from Celle in the period you state.
There were many detachments of Javelins to Gutersloh and these became commonplace after the failure of th 1960 summit meeting, derailed by the U-2 shootdown, and during the Berlin crisis in the summer/autumn of 1961.