Answer: I think your azaleas are acting naturally. Azaleas generally come into bloom about Mother's Day, but the flowers last only a few weeks. Yours may have been blooming for several days before they were purchased which is why the flowers have aged so quickly. Also, repotting while they were in bloom probably stressed them to the point where they abandoned their flowers in favor of getting their roots established. Removing the spent flowers was a good idea in terms of helping your plants look more attractive.
Phoenicia azaleas prefer afternoon shade and will droop if sunlight is too intense. I'd place them where they receive a few hours of morning sun and then shade or at least dappled shade in the afternoon.
I suspect your plants will soon recover and their vitality will return. Next spring, around Mother's Day, they should reward you with lots of lovely blossoms. Enjoy!
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