Swollen nodes need help

So here is my deal been reading a bit. And some say this is good some say bad. Can't figure it out.plants are on a 18 hr light schedule. Unknown seeds cause they came in weed I bought.I topped it today 01.6.2020. Because several people said do it. This is my first real grow with a tent and lighting .I'm on a 400 watt mh set up then 400 hps for flower.may try to get a 600 but not sure yet.some light has been leaking in from the bottom of the tent but it's in a dark garage that isn't opened much and a 60 wat bulb.I have since fixed the leak best I can.2 of the 3 plants look fine this one has stayed short and bushy and I'm not sure if I need to prune it or what . Below are the p8cs of my plants . And helpful advice would be much appreciated. Also the plant with the swollen nodes half way up the plant as seen in the pics it's normal not swollen20200106_014216.jpg
 

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The smallest plant in the back is the one with swollen nodes it seems to always be wilted no matter fed (fish fert) or water.
 

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There's soke old threads on here about it. Seems either sign of a healthy plant thats been topped? Or building extra strength to support the buds coming. Just what I've read. Ive had 1 do this before and I didnt have any issues.
 
Sweet thanks so much I just signed up and was having issues finding info on it.it wasn't topped I germinated it from a seed.I topped it today from several things I read but now I'm wondering if I #$$%ed up by doing it .but it's my first real time.I did one before start to finish with a low wat led for full veg as in a shop light lol the flowered with 150 wat hps.didn't get much lol.anyways I did top 2 plants today left the big one alone so should see in a week or so.
 
I generally top all my plants but theres always a couple that lag behind so I leave those ones be. It will most certainly increase yeild
 
These were out of a midgrade bag
 

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Oregon elite seeds. They have buddha magnum autos for 25 bucks. Bunch of others but I had gotten those .Can call with credit card easy and fast
 
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