Orchids Growing Out of Control!!!

[PhalinVA]

I have four orchids (all Phals) growing out of control. They are throwing aerial roots everywhere (not in pretty way, they kinda look scary now) and the roots are peeking out of tiny holes of the pot at the bottom. I did repot them a few month ago. I'm not sure what I should do now.

A little about the orchids' history... I knew nothing about orchid until last fall when I received my first orchid from my boyfriend. I killed it in a few weeks by overwatering and was discouraged. I received three more orchids in 4" pots on Valentine's Day, and I almost killed them again but YouTube finally educated me and saved them. I bought another 3" orchid from grocery store meantime, completing the four mentioned above. When the petals fell off, I followed the instruction in YouTube and repotted them all to the transparent orchids pots with tiny holes at the bottom and side, in premium orchid mix (which I know nothing about but the description sounded good to me). The ones from 4" were repotted to 5" and 3" one to 4".

That was end of May. By end of July, each of them grew at least 3 new leaves (one is having 4th leaf), and the grocery store orchid starts to squeeze out several roots through the side and bottom holes. I had to repot it to 5" (2nd time repotting in 2 month). By end of August, all Valentine's Day orchids started to do the same so I repotted the biggest one with 4th leaf to 6". To me, it seemed weird because YouTube video said that orchids usually grow 2-3 leaves per year and should be repotted only once a year and move up pot size every other year. How come my orchids are about to pop out from the pots only in 3 month?????

Valentine's Day orchids also started to grow a lot of aerial roots everywhere - some are growing to bottom, but others are growing upwards and sideway, etc. They were cute at the beginning but when I saw the plants were covered with roots every angle, they looked rather unpleasant.

And then Valentine's Day orchids started to have spikes...with huge leaflets. I was surprised to see them in July because the petals fell off in April. And then these spikes started to develop huge leaflets instead of growing tall. I thought it might be keiki at first, but no, they are not. They are where the spikes should be (not at the bottom of the plants) and no roots around them other than the crazy aerial roots. Two of them have double spikes and they all have leaflets as big as my thumb (and are still growing bigger).

I'm worried I'm doing something wrong with the plants. I water them only once a week and haven't given them fertilizer for a while. (Used to give fertilizer once or twice a month until July) They were perfectly normal orchids when I first brought them home with a lot of pretty flowers and normal spikes with normal or no leaflet. They had a couple of aerial roots but not so many like now. I'm afraid they will just keep growing to 5th and 6th leaves with no flower and grow out of the pots again. What should I do? Should I keep moving up pot size? Should I control light? I'm so confused and lost.