There is wide agreement that Mark is using the so-called sandwich
technique, similar to Mark 3:22–30.1,2,3 This means that he has placed the story of the bleeding woman in the middle, like ham and cheese, with the story of Jairus’ daughter on either side, like two slices of bread. Just as ham and cheese gives flavour to the sandwich, so the bleeding woman adds a richer understanding of the unit. We must remember that the Gospel writers are not recording history according to modern rules. They are selective with the eyewitness accounts at their disposal (John 21:25) and often arrange their material to make a theological point. However, this does not call into question the trustworthiness of what they have written.
21 And when Jesus had crossed again in the boat to the other side, a great crowd gathered about him, and he was beside the sea.