I never go by the expected FG for a signal to bottle...mostly because I never hit it dead on. I use it more for a "head up! the fermentation may be almost done" kind of signal. I have had batches take a week to drop from something like 1.012 to 1.010 and I have had batches go from 1.065 to 1.010 in ONLY a week. It depends on a lot. I wait about 2 weeks, take a grav. reading to see if I'm close to the expected FG, then wait 7 days more take another. If there are no changes I bottle, if it changes so much as 0.001 I may wait a few more days. I have never had an extra week or 2 of fermenting time ruin a batch. In fact, i find the finished product ends up cleaner tasting and with much better clarity if i do end up waiting.
And most of all, I would be careful not to bottle too early or you may get some bottle bombs. That will ruin your batch for sure.