Hiyah Toots
I'm going to take a stab at your questions - I hate seeing posts go unanswered, but honestly, I don't have all the answers you're looking for.
You might want to take a boo at mom2girl's journal - she's been trying to mix a CKD and TKD and we've been discussing options in there, you might find something that helps.
Honestly, I think those post workout sugar hits shouldn't be counted toward the daily number. If I remember correctly this was also the case when I did the t-dawg diet last year (70g on lifting days, 30g on non lifting days). That hit of carbs has a very specific purpose, and fat storage it aint
Doing the carb up along with a TKD can serve a purpose, to reset leptin levels, and if this is your goal then it would be done based on a schedule of BF%, the ministry of fitness link provides a guide for this. You'd probably end up doing one every 4 or 5 weeks, instead of every weekend. In which case you're still doing a TKD with a refeed every once in a while (I think I'd find that made it easier to plan and would take a lot of the confusion out of it)
Re suppersetting - BSBW has some good workouts, and I know you just got a copy of it. Watch it though - that's a pre-comp exercise plan and it can lead to burn out with all the daily double sessions (advanced portion). ABCbodybuidling.com also has some good routines - great place to waste time!
The difference between bonking and depleting? IMHO the only difference is intent. You intend to deplete, bonking happens by accident (not like this anything you don't know already!). The effects are pretty much the same though, carbs are very low, you're depleted and you might be short on potassium.
Supersetting and circuit training is intense - it makes for a great depletion workout. 7 supersets might seem piddly to you, but when done right it's a fair bit of work. If you had a big workout the day before then had this workout the day after I'm not surprized you 'bonked'. Lesson learned? Wait a few days between these types of workouts!
Like I said, I just don't have much to add.
-N