All about 100% wrong.
Far better for hives to be on station - shorter the flying time, more collected. More pollination, too - although OSR is around 90% self pollinating anyway.
Umpteen per acre (well, hectare) as the crop is huge but relatively short lived. They will likely need moving soon after the crop starts to go beyond the flowering stage.
One spinning may well be enough in a normal season (not the last two!) It might depend on the weather and the strength of the colony.
Label it as whatever you please. It will not affect the honey one iota. But do not jar it, is my advice.
I sieve mine into 10l buckets and allow it to granulate. I can then deal with it at relative leisure. It can be soft set, allowed to make a coarse soft set (yummy if you like that slightly gritty texture), blended with other honey types or however you might like your honey. Left to granulate a second time may take much longer than the inital setting in the bucket and can be consumed as runny honey, although granulation may set in as LARGE crystals.
From someone with OSR within reach of the bees every year. It has been a nuisance these last two seasons as the weather in 2012 was so poor and the crop was so late this year (coupled with the colony development being slow) has led to too much OSR in the hives at cropping time. I can cope with it easily - just leave it on the hives - but the bee farmers will have had to work that much harder to avoid this.