FLTSATCOM uses geostationary satellites...there is no “pass”...either your location is in the footprint or it isn’t.
Are you 100% sure about this? FLTSATCOM 8 appears to be geo but FLTSATCOM 7 appears to be in an equatorial orbit. 
Geostationary orbits are a form of equatorial orbit.
FLTSATCOM 7 is in a geo orbit.
https://space.skyrocket.de/doc_sdat/fltsatcom-2.htmMaintaining a geo satellite with a near zero orbital inclination uses up station keeping fuel. One tradeoff the designer has is to allow small amounts of inclination (for example +/- 5 degrees) to develop. Doing this means you don’t have to perform station keeping maneuvers quite so often, saving fuel and extending the lifetime of the satellite.
To the observer on earth, this results in the satellite apparently “wandering” slightly in the sky, drawing a figure 8 pattern on the suborbital point on the earth. Maintaining a bore site on the satellite would require a simple antenna tracking mechanism, but the beamwidth of most directional UHF antennas is broad enough that this isn’t necessary. On Ka band it would be.
FLTSATCOM 7 and 8 are beyond their planned lifetime. I wouldn’t be surprised to if a decision had been made to leave them in place as long as they were working, but to allow them to develop some orbital inclination.
When a geo satellite is “retired” it is placed in a graveyard orbit. This requires less fuel than deorbiting the satellite. The satellite is pushed a few 100 km farther out than the geo orbit and left there. This frees up that geo slot for another satellite.
Also, you are talking about FLTSATCOM 8, not UFO8, right?