Column "Delay" calculated incorrectly in action configuration form if we use individual "Escalation period" for operations. Unclear strings.

(1)
See attached screenshots.
Content of the "Delay" column is WRONG and misleads A LOT.
Only "Default escalation period" value is used for calculate displayed operations' delay.
There is a small exception - for operations with several steps and with the individual delay it is calculating as another puzzle - for one step the default period is used, for all rest steps in this operation - individual delay is used <- it's again WRONG and also misleads already second time.

Server is ok - it execute operations according to individual operation delays - just has been tested.
This problem related only to the frontend.

(2)
Let's consider only 2.0 version:
It's not possible to intuitively understand what next strings mean:
"Escalation period" <- on configuring, "Period (sec)" <- on view !
They are related to (or affect on ) current operation step(s) or previous or next ?

To fix these unclear strings I **strongly** suggest to chance them:
on Action tab:
"Default escalation period (minimum 60 seconds)" -> "Default operation step duration"
"(seconds)" -> "(minimum 60 seconds)"
on "Operations tab"
"Escalation period" -> "Step duration"
"Period (sec)" -> "Duration (sec)"

Also - documentation is not perfect in this area and has to be improved.
http://www.zabbix.com/documentation/2.0/manual/config/notifications/action/escalations