Will adjusting support beams in basement cause shifting to the upstairs such as drywall cracking, door jambs and windows shifting?
Yes it could if you have put the wrong beams in and jacking up your joices to install the wrong beams.
On the other hand if you are installing beams and didnt put enough support on or around the area where you are sliding the beams if you are opening up low bearing walls could allow the floor to drop down a inch or two and this could create these signs.
Of course it affects the structure of your house. First of all this work has to be done by proffesional contractors. And structural engineer needed before any adjustments or replacing something like that.
If you have tiles especial for the floor you are going to see them cracking some time soon.
It sure will. While your at it why not fix the support footings in the basement to prevent further settling.
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