not sure either. this below is from ff. ff says if it's between 2 kinds, record the more fertile kind, but they really are talking about pre-o. it does include something like a flour/water mixture and 'milk' under creamy. could that be it? in any case, there really is no reason to record cm after o, if you really are sure that you did o, so if that's the case, dont stress too much about it.
Creamy: Record your cervical fluid as "creamy" if it is like hand lotion, white or yellow or cloudy/clear, like milk or cream, mayonnaise or like a flour/water solution. It may stretch slightly but not very much and break easily.
Watery: Enter "watery" if your cervical fluid is clear and most resembles water. It may be stretchy also. This cervical fluid is considered fertile and this may be your most fertile cervical fluid or you may get it before you get eggwhite cervical fluid or you may not get this type of fluid at all.
Eggwhite: This is your most fertile cervical fluid. Record "eggwhite" if your cervical fluid looks at all like real eggwhite, is stretchy and clear, or clear tinged with white, or even clear tinged with pink. It also resembles semen (and has a lot of the same physical properties to allow the sperm to travel and be nourished). You should be able to stretch it between your thumb and index finger.