The problem is that the slow-release fert (when not used properly) can throw out ur PH. Most growers should notice that the PH in their water drops as they add their Part A & B - This is beacuse it is acidic.. So with a great deal of Slow release fertilizers in ur soil you have a great deal of acid in ur soil, so you must remember to water it thouroghly (don't drown it though) otherwise the PH from the tap water cannot level ur soil out to the correct PH and all the acid will not wash away, but rather sit in ur soil giving you absorption problems.
The other problem with letting ur soil dry out when using things like slow release ferts (& cow/chicken manure) is that without the water there you are basically dipping ur roots in a concentrate which will surely be too strong 4 them.
When feeding slow release fertilizer, that is normally all you shoud feed unless you notice ur plant is deficient in something. I'd say that is how you got such a drastic burn.
I highly recommend u Don't Transfer it. It's root system would be too well established too deep, and uprooting it now would do more harm then good.
Sorry 4 the rambling, i never claimed to be a good teacher
Hope it helps though