I think it would be fine to take a dose in the evening one day and take it again the next morning. My doctor has me taking Crinone twice a day this cycle so I think it's ok to have 2 doses less than 24 hours apart. From what I read Crinone releases into your body very gradually (it takes about 3 days for it to fully release) so you don't have to worry about having a super huge spike in progesterone if you have 2 doses closer together.
I've had cycles where I took Crinone in the evening and others where I took Crinone in the morning. I find that when I take it in the morning there is less buildup inside me so now I prefer the morning.
Me (32), married to DH (36)
3 years of TTC #1, M/C @ 6wks in May 2013
Mom to Liliana born May 2014