Now after the hardfork the Steem nodes return some values (for example the weight of each vote) differently and I need to make a few changes in order to correctly calculate the percentages.

The Payout Burned shows the payout amount that is not being paid out, because people voted within the first 5 minutes after post creation time. The rshares are not really getting burned (I will change the label in future), they are just not leaving the reward pool.

If you would make a post, someone votes on it after 2.5 minutes and there would come no further votes, the burned percentage would be 50%. Normally it is around a few % (your second example looks realistic).

The Transfer Amount is just an estimate of how much STEEM/SBD has been spent for boosting a post. It is not working for all posts, because the bid bots don't return a reference/link when refunding a bid.

I hope this helps :) Many things on my todo list...