Experiencing some challenges need advice.

Hi I have been at it for 5 years and pulled off many successful deps and full term harvests. I consider myself a a knowledgeable grower I have hit an ounce per square foot in greenhouse sea of green many times and have grown 5 pound plants outside. I have a greenhouse thats full of m1-OG its some new cut apparently a back cross of titan OG. The greenhouse is 30 days into flower and they have tripled in size since I took the light off of them. Before that they were under 20 hours of supplmental light to keep them from flipping they were planted june 30th. The greenhouse had some lockout issues in veg and I fed them pretty hard which was a mistake didnt see any burning they just had deficiencies nitrogen/cal+mag. When I flipped them I did an enzymatic flush with SL-100 and microbe lift pl and after that they just shot up and became the healthiest plants now some are close to hitting the plastic in the greenhouse. I have been feeding floranova bloom, photosynthesis plus, big swell, true blooms, and hit them with massive bloom formula once. They have been loving the feedings and are all praying and very healthy stretching and setting flowers. No leaf tip burn or nute burn but they are definitely stacked. My concern is that I am 30 some days into flower and the plants have been continuing to stretch, they have seem to stop after their feeding of true blooms yesterday or atleast slowed down. None the less they were continuing to stretch in the 4th week. The buds are forming but arent as large as other strains I have grown 4-5 weeks in. My hypothesis is that when I did the enzymatic flush and unlocked them right after I flipped them into flower that it created an abundance of nitrogen that they dont need or should not have in the beggining or middle of flower. I have only been feeding bloom nutes (floranova bloom,big swell,true blooms) for the last 30 days but I'm afraid that the ratio of nitrogen in the substrate is higher then P&K due to the left over nitrogen that was unlocked during the enzyme flush. I will provide pictures, but I am just looking for advanced growers advice on what to do in the the situation, there's time left in the season and I can let them go till mid to late October to flower. October 6 will be 9 weeks since flip. The buds are deff growing aswell but there seems to still be alot of energy being put towards stretch and feel like it's really unusual to have a strain that stretches for 4 straight weeks. I also am wondering whether because I just took the lights off and they went from 20 hours of light to 14 hours of natural light instead of pulling tarp and 12/12ing them that they could of transitioned slower we are @ 12:50 minutes of light here now naturally so the plants have ovbiously been experiencing a gradual decrease in light. I plan on hitting them with MOAB a 0-52-30 to up the levels of potassium and phosphorus to try to get them to just focus of flower formation. Im hoping this project turns out alright. Any advice on how to get these ladies to stop stretching and just bud out really nice is appreciated.