On the other note.
I re-downloaded LSGG, removed the default ADE file and used the one that AIG has on their website and recompiled it with ADE1.67. As a result, all parkings were fully repositioned (moved a bit farther forward), some default scenery elements such as satellite terminals pop-up (that tells me that exclusions were broken during recompiling as ADE did not recognize them) and still no jetways. I have exactly the same problem with MA Oslo and I know for certain that it's been partially created with AFX, so I gave up an this as it's not up to even FS2004 quality standards anyway. Thus, any modification of AFCAD file created by AFX with other software, such as ADE for example, creates issues. We found this on AIG forums a couple of months ago.The only solution is to purchase AFX, the action I'm extremely reluctant to implement as the software is badly outdated. Honestly, it should be now either freeware or respectable developer MUST stay away from it.
Thus, it neither a bug nor someone's else fault, rather unfortunate coincidence in my case.