One mount with several plants - bad idea?

I mounted several mini-phals on one log, was it a bad idea? Here is the picture:


There are 4 plants, from left to right:
Phal. gibbosa seedling, Phal parishii seedling, Haraella retrocalla baby and Phal. lobbii blooming sized with two spikes on the top.
Because there are seedlings I put some sphag under the base of each plant.
I mounted lobbii because I just killed one potted into sphag, then there was still a lot of space on the wood piece, so I put seedlings all over.
They sould be ok, right?
Thank you for looking