Jetway wheels sinking???

[BMG50]

Hello folks...When the jetway connects to the door exit of the plane,in order to correct for height,the tires will sink into the ground. I thought sometime back that I saw the jetway actually move up or down on it.s upright legs to adjust for height. I have been changing some contact points for some add-ons and may have inadvertanly messed something up...So how are the jetways supposed to work?? Thanks Lou

[N700MS]

That's normal. When the jetway adjusts down the wheels go into the ground.

[BMG50]

That's normal. When the jetway adjusts down the wheels go into the ground.

Thanks for the info , N700MS.......Lou BMG50