After flowering, the stem should be cut so there are no nodes left on it- if nodes are left, like in your picture- the orchid will rebloom from those nodes but will spend excess energy and give smaller flowers and it will not be good for the orchid in the long run. When we cut the stem short, the orchid has time to grow and it flowers when it's ready. So now you might ask, well, it's flowering either way, cut the stem or not, so why cut the stem?!
The answer is, after cutting the stem, when the orchid reblooms after 3-4 months, it will send up MULTIPLE stems from it's base and flower profusely!
Hope the above makes sense, sorry for any confusion.
