power inroads settings

Hello .....

I am new to power inroads i found a lot of .dgnlib files in workspace and no one was showing attached with power inroads i made setting like pics below for testing purpose copy all dgn files in a folder and give path of that folder in dgnlib variable in configuration now settings is showing in power inroads like below pics

I am confuse on some points

1-why not all dgn lib automatically attached to power inroads design file?

2-how to configure civil cells library? my civil cell library is emtry even i attached all dgnlib all at once...

3-if xin file is controlling feature definitions that xin file is attached but levels are not showing in design file when i draw a aliment it never goes on a level but it goes on level 0 as shown in attached pic & if levels controls by dgn lib then how i know which dgn lib i should attach for civil.xin?

4-element templates is also showing attached dgn files but no levels in design file no civil cell why?

5-how i can get spot levels on surface?

6-if i import surface or creat surface through civil tools shows in power inroads explorer if i put surface feature definition on auto export so if i will put geometry like aliment  profile etc on auto export that will also show in power inroads explorer?