Congratulations on you LDs. Just keep trying and I'm sure you'll have dreams longer and longer.

I'm not an expert, but the few times I tried WILD, or lay there in bed telling myself that I'll become lucid, it happens similar to what you describe (even if the dream lasts just a few seconds, and it's not vivid). I can either get lucid, or feel as if I'm transitioning from bed to dream, but when I wake up I realize that the "transition" started much later than when I fall asleep. Let's say it's 10am and I try to do a WILD, and suddenly I find myself transitioning, I enter a dream for 5 seconds, and I wake up at 11.30am ...

If I recall correctly, I read around here that in WILD you don't neccesarily enter REM directly. Depending on when you do it, you can first have a normal sleep period. It's like as if your brain "skips" that part for you, or makes you feel like jumping in time, meaning you are in bed eyes closed, and by the time you start transitioning you already slept some time...

But maybe I'm wrong.