I would start fertilizing it, Ruxandra. I originally thought it was reaching for more light, but after reading your remarks here and on the OrchidTalk FB page, I believe the lack of blooms along the full spike could be caused by poor nutrition.
To support a spike like this in your home, I feel you found the best way. If it was in the greenhouse or on a porch or outside, I would tie the spike up to something above it. In the greenhouse, I have a gramm that gets 6 to 8+ foot long spikes. I usually have to tie the end of that spike up to keep it out of the way and to make sure it doesn't knock other smaller plants over as it blows around under the fans.
My recommendation is to start feeding this orchid and on the next blooming I expect you will see blooms along the entire spike. Good luck my friend!