eh i see a lot of problems with your situation. the main problem is you did not build a base prior to juicing, now you are dissapointed in your results.
now you are wondering if you should work out more, eat more etc. this is why its important to get those issues ironed out BEFORE juicing, or you just end up screwing with your HPTA for nothing. the strength gains you got could of been achieved easily without juicing, the fact u added 50 pounds to your bench proves that you were way below your genetic potential. never should anyone add that much strength to their bench press in that short a time!! that is a huge red flag that your body isn't conditioned well at all
i would chalk this up as a learning experience. and spend the next year or two honing in and your diet and workout strategies. once you find something that works for YOU, then you can venture into another cycle.
you are a bit on the heavy side so i would spend 6 months cutting down, knock that bf down to a level that is good. at 18% bf you aren't gonna have very much definition.. then once you cut down i would hit the weight room hard.
to those above saying you need more food or more protein, this is not the problem as the OP is overweight, if he was an ectomorph and skinny then that would be my recommendation. in his case he has to get that body fat cut down to probably the low teens as his goals are not strength but definition. i think 90% of posters on this forum want to be strong but also want to look good... this is achieveable but it takes a lot of hard work and understanding what works and what doesn't.. only experience will guide you.