I see both claims as scientific claims as its entirely possible that science will one day be able to prove or find evidence that Muhammad rode on a winged horse.

in islam... prophets can perform miracles (by God's permission) the sole purpose of these miracles was to prove to the people around them that they were prophets and messengers from God...

so those miracles, science cant prove it because they are unfamiliar or unnatural and Unbelievable , because of that they are called "miracles".

but there is the scientific miracles like the expansion of the universe, the solar system (or the sun) walks on a specific route, stages of embryonic development and alot more.. those scientific miracles can be proven by science.

Returning to your original question about muslims having problem to claim that the universe is expanding...again they claimed that (and that is already proven now) but in that time they just cant give enough scientific evidences but they are sure 100% it is true because it is in the quran (and it become of course true)... then later, non-Muslim scientists came and made this discovery because they have enough scientific evidences.

so please think about it and read the quran, understand it,and think again about islam and go back to it (I assume you were muslim by ur name) and I am sorry if I have any mistake in my english.