I´ve seen three sort-of strange things in the sky in two days (serious question - not weird ufo-type of thing)

I´m into amateur astronomy (VERY amateur!), and always look at the sky when I´m popping out for a cigarette. Anyway, I live in the NW of Spain, and three times in the past two nights I have seen lights very high up in the sky, probably at orbit level looking exactly like satellites (the same kind of light and quite wavery-looking like satellites do) and bright-ish (magnitude 1?). Always in the West. When I checked up on the website www.heavens-above.com , there were no satellites passing that area at that time. Also, the one I saw tonight was strange - it disappeared way before a normal satellite would disappear, and I saw it at a far later hour than a satellite would be seen. Correct me if I´m wrong, please, but isn´t there a cut-off point at night when you can see satellites or not i.e. the sun can´t reflect them anymore due to your position from the sun? I´m not sure.
Anyway, what could these lights be?

or perhaps it could have been a satellite that you do not know about, one that websites have yet to find, I was in the military and we do launch satellites that do not go in the "Record books" as you would say, Top Secret satellites, if your a fan of astronomy than you know of the space plane that the USAF sent into orbit a month or two back, nobody knew that was supposed to be there, someone stumbled onto it, and got good video from there telescope.

If it was far to the west, then it will have been closer to the daylight side of Earth and consequently would still be catching the sun's light. And satellites disappear mid-sky because they move out of the sun's light. They don't always go horizon to horizon. Often they get less than half way, or begin to show close to the horizon before disappearing over it.

The other possibility is that it was am aircraft too far away for you to see the strobes flashing.

You very likely were seeing the bright stars Sirius, Procyon, or Capella. Bright stars often flash different colors when they twinkle because of all the layers of atmosphere with different temperatures and wind velocities/turbulence refracts the starlight on its way to your eyes.