sci fi chanel in America has the weirdest horrible breaks, I can not speak for BSG, but I can for Atlantis and SG1, so I am almost sure it is the same for BSG.
What they do is air the first 10 episodes of each show, side by side, then they take a break for almost or over 4-6 months, then they air the second half.
www.gateworld.net shows stargate sg1, stargate atlantis, like all other series of stargate have the full 20-22 episodes, but sci fi only showed the first half.
England starts showing the episodes months later than sci fi, but then instead of having months and months off, we only have 2 weeks off for Christmas, then we get them both back, and usually finish the series 1 - 2 weeks before America.
didn't the first series of bsg actually have under 10 episodes :S (excluding mini series?)
anyway, looking at
http://www.playusa.com/DVD/Region_1/...-/Product.html (where I get region 1 dvds for England) it says "the first 10 episodes" so it indicates that there will be a diffrent second half
It really sucks for you! but dont worry, it will return!