Not strange at all. Our blood making system responds to signals and availability of "parts". You have been in short supply of neutrophils which triggers other parts of your body to send signals to the bone marrow to 'make more'. Blood making heading to platelets was diverted to making neutrophils (simplistic explanation). All of our blood starts out with a single type of stem cell which creates a few more specialized stem cells that can re-create our entire blood cell system through differentiation. As these cells divide, they respond to protein signals that tell them which kind of cell to become. Once a cell is committed it is taken out of "inventory" sort of speak.
Your platelets should begin to recover now that your neutrophils have 'filled up'. A sign that platelets are too low are red dots on your skin called Petechiae which reveals blood clotting issues. Bruising is another sign.
You should consider restarting sprycel at 20 - 40 mg as soon as practical. I was re-started at 20 mg and never looked back. Given your prior myelosuppression, you seem to be very sensitive to sprycel response as I am. Hopefully you will avoid repeated myelosuppression episodes - but only if you lower your dose and work up (if needed). As I mentioned, you probably will respond quite well on low dose and enjoy minimal side effects as a result.
It takes time and careful initial monitoring. Hopefully your doctor will agree to take you on this path. Remind your doctor that with few or zero blasts in your blood, you have time to experiment to get your dose personalized and response maximized without myelosuppression. CML is a very slow disease in chronic phase (i.e. no blasts).*
(*This is why many women who have CML are able to stop treatment for nine months during pregnancy. This assumes you have reached CCyR)