Hi Lori,
If your plant was standing in water, it's probably the reason leaves are curling. I've seen it happen with other plants, just recently at Home Depot.
It's a good thing you tossed out water..did it smell? How long was plant sitting in water? Does your pot have drainage holes?
Monstera/Philos soil should dry before adding more water..Otherwise, they rot and grow spindly. Especially if it's sitting in a dark corner. I've read via plant books that Monsteras/Philos do well in dark areas, which I totally disagree with. On the contrary, they need light to grow, especially those w/large and/or variegated leaves.
BTW, your plant is quite pretty..Toni
PS, remove any mushy foliage/roots

Thank you, Toni! Yes, the water did smell bad! Does it have root rot? It probably took me 4 days to notice (I'm bad). And it is sitting in the middle of a room in between north and south facing windows. I am thinking it isn't getting enough light but it is so big that there are only so many locations I can put it.
I am letting it dry out now, it is still moist. It has a new leaf coming out, I hope I didn't kill it.
Thanks again for the info.
Lori
Tried to get a shot of leaf curl.

Here is a link that might be useful: {{gwi:102065}}

Looks good to me. Don't suppose it's true for all philos, but this one is used often down here (south Louisiana) as a landscaping shrub, and they take all kinds of conditions from full sun to pretty heavy shade--of course some look a lot better than others!--and they take heavy downpours and periods of drought and most anything this climate throws at 'em. After seeing some of the ones down here I'd be afraid it would eat the house tho'!