Oooh, also 
re DS4's sleeping, PD. But pleased-for-you . Honestly 
.
My DD, even when she is not being a teething monster, is still as far from sleeping through as she was as a newborn. In fact, as a newborn, she would go to bed (with me) at 11ish, wake at maybe 2ish for a quick and sleepy feed and then go back to sleep until 6, 7 or even 8. OK, so she now goes to bed at 7ish but she frequently, as last night, wakes hourly between then and 11, expects boob at 11 at the latest and then again in the wee small hours, at which point she comes into bed with us.
Recently, we have enjoyed the small victory of often being able to put her back in her cot after the 2am-ish feed, simply because she likes her own space so much and has obviously figured out that she gets more of it in her cot than in our bed. She does then, though, wake at 5 and expect a move to the parental bed.
So, even on a good night, I am up twice. In fact, it's been a lot more recently as both DC have had the sort of horrible snotty colds that seem to require intensive middle-of-the-night parenting. Plus, DS is suffering from a surfeit of dinosaurs, bumble bees and ghosts that invade his bedroom and leave him sobbing in terror. I have had some success in instructing him to say, "No, go away dinsosaurs" in a firm voice but that's not much good when he has nightmares (night terrors?) from which he can barely be woken. Last night I had to lie on his bed and cuddle him between 1.30 and 2.30am (you see that the timing is burnt onto my brain). He then appeared in our room at 5-something-stupid and had a horrible shouty tantrum when he was removed to his bedroom. But he was still asleep there when I left for work, eyes pegged open, at 7.30.
Anyway, I shall now stop subjecting you all to my sleep woes and just take out shares in the sleep board.
Good luck with the TTCing, manda, the job-hunting, Heckle, and enjoying the sun, everyone.