Identify a Hyper Link with any property that is not depended with Cell value in Key word driven test

for question 1:

Is there some other field that unique identifies the link, perhaps the text?  That would be the thing to use.

for question 2:

There are ways to add hard delays:

https://support.smartbear.com/testcomplete/docs/reference/program-objects/aqutils/delay.html

However, the better way to overcome these timing issues is with a Wait* method. 

https://support.smartbear.com/testcomplete/docs/reference/test-objects/members/window-and-process/wait-method-window-object.html

(or look under W in the list below)  

There are many different types, WaitObject, WaitChild, WaitBrowser, etc.  This will give you a more specific wait time and not make you have to guess when your item will be available.