Issue with knockout custom validators on observablearray

Here is the fiddle that demonstrate my issue:

http://jsbin.com/ocizes/19/edit

I have two validation rules on the values of the observable array WeeklyData(). one is for min/max validation other to make sure the values are given in 15 min. increments.

problems:

1) when I update the textbox values, the validation doesn't fire. Only when I change the observablearray values in code the validation fires. How can I fix that.

2) when I have multiple validators defined on a single observable array, only one of them fires. Not both. For example, a value such as 205 should fail both validations (min-max validation and 15 min format), but only the first one is fired. Is there a way to show both?

3) I want the '*' to be displayed against each texbox in the array, in the case of a validation failure. How to do that?

Thanks in advance for any help.

Start with the linked JS Bin and reproduce the three observablearray custom-validator cases: textbox updates, multiple validators, and per-textbox asterisks. Done means identifying behavior for each case and documenting or testing a fix that triggers validation on edits, reports both failures, and displays the marker beside each invalid textbox.

Written by the indexing model from the issue text.