Cindy, when you give flowers - you have to make sure that you click the BACK TO QUESTION LIST - that way they stay with the question or comment.
The flowers only seem to disappear. As described it depends upon how you navigate backwards.
I have found that if you give flowers and then use your 'back' button the flower will disappear. To give flowers click the flower then click the 'back to questions list' button - OR - read the first page using your back button then when you get to the bottom of the page go back to the top and click all the flowers then click the next page and they will stay there. That's what I do. Hope this helps.