With out seeing Toby 'performing' as it were, I would think he hasn't got the basics in place before moving on to the next stage.
If he won't come back when called it's not a lesson that's been learnt, only give the command if you can ensure you can make it happen, and keep on at it till he's 100%
For the recall, go back on the long line and start again. On walks get him in close for the whole walk, no free running, you want him close for flushing any way and it's easier to control him when he's with in grabbing distance

Running in, again it seems you've moved on from the stop on to other things too soon, before the stop is second nature.
Now he's got the thrill of the chase in to his system it's going to be difficult to get back to a reliable stop, it can be done though, start from the beginning in a controlled environment, might be worth enquiring about a local rabbit pen.