Yep same here! My little girl is turning 1 in 3 weeks time and for the last month or so there have been days in a row where she dropped her morning nap and just had one long early afternoon nap. Then went back to 2 naps similar times to yours and then back to 1 nap again. For the last week she has settled back to her usual 2 naps so i have no idea how to tell when she will actually consistently drop one of the naps. Im just going to go with the flow!

My friends son is 15 months old and he is still having 3 naps a day!