If your adding 4-6 pounds in 4 weeks that is a pretty steady and quick rate of gain, especially seeing you do not need to go keto to lose weight, You could easily lose some weight with a lot of carbs in your diet and meeting protein and fat minimums as well as fiber minimums. Staying lean year round is great, but you may find a hard pressed time making quality gains or progressive overload with short cycles of cutting and bulking and not allowing the body to really get into a surplus and really hammer out some quality gains in the offseason. Another reason why many competitiors do not do short cycle's of cutting and bulking, if they did they would never see much merit to progress and why many people take a good 2+ years off of competing to make improvements. Now for the general gym goer sure if you want to look lean year round it may work, but only giving yourself 4 weeks to try and grow is very hard and same with 4 weeks of cutting, you are basically going from keto (4 weeks) to throwing in a bunch of carbs (non-keto) that alone will spike your weight a few pounds because carbs hold 3g of water per g of carb.
Again the article is very outdated by Norton, he himself does not even use this on his own clients now and days. Layne knowing him personally has not been cutting or bulking in cycles and has been chasing his power lifting goals and has been eating good for a year + right now getting ready for nationals (power lifting meet) and his all time strongest.
If your last bulk got out of hand then you did not control your surplus and should of lowered it and took it longer.
Remember ROME IS NOT BUILT OVERNIGHT, take it slow. the Mirror > Scale, even if you dont gain weight one week that is not the make or break it all to your changes for the week and your caloric intake.