What's your sleep routine for your 18mth old?

When I was working and DD was going to Grandma's during the day - I'd wake her up about 7ish drop her at Grandma's at 8 and she was back down by 9.30am til about 11ish, then she'd be back down by 2ish til 4.30ish. I'd pick her up at 5ish & we'd get home and do our nightly routine - dinner, bath, play & she'd be in bed by 7.30-8pm.

When she is with me she wakes on her own anywhere from 7-8am, and will only have 1 nap. Sometimes it's around 11ish til 1ish but mostly it's after 1ish & she'll sleep til maybe 2.30pm if I'm lucky, then will stay awake until bed time at 7.30 - 8pm.

She still wakes during the night, sometimes more than once other times, not at all. (Lately, when I go into her off a night she is hysterical when I leave her which she never used to be).

Is what I am doing ok? Or should I insist she has more sleep during the day. When I have tried, she just whinges and cries and screams (OMG the screaming...). At home, she's in a toddler bed and at Grandma's she still in a cot.

It really frustrates me that she sleeps so well at Grandma's and not for me =(