Correct the Charecters jumping from Quest mode to Story mode is the first bug. I have the same issue.
The 2nd bug is not being able to proceed as feats are full - this is not really a bug as normally your power feats cannot be full.
The issue for you will be that so far the Devs have so far not had time/been able to retrospectively update any issue with Charecters caused by bugs.
You will most likely have to start a new party.
In regards to the first bug I don't think the Devs have actually acknowledged yet. Hopefuly it is resolved in the next patch - as it locks quest mode out completely if you are affected.