I am also finding this increasingly frustrating. I switched from iPhone to this lovely Galaxy III, I simply love the options of customising almost everything! iPhone? Nah, not for me. I turn my phone off every night, on of a morning, and I have this ritual - before textting/emailing go into settings/language and choose swiftkey together with switch from 2G to 3G (but that is simply because 02's reception is zero in my area, so of a night once home I have to switch that to 2G to get a smidgen of reception).
I have tried all updates to s/w, inc trying another keyboard and ditching swiftkey. But Swiftkey works so well for my typing style. I can't believe there is no fix for this? Why have the ability to choose keyboards on the Galaxy if actually, you can't really use them? Perhaps Google/Swiftkey and Samsung need to have a conversation?:-\