Unless the clothing is dynamic clothing (which would be set up in the Cloth Room), your clothing doesn't "sense" obstacles that it shouldn't go through. It may have certain morphs to allow angle adjustments etc, however, if you're familiar with the Parameters Palette.

But wait a minute... that legband is supposed to be on her leg, and it's not? Then you must not have conformed the clothing figure to Victoria when you added it. In the top menu, click Figure > Conform to... and select Victoria 4.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3