Ich habe die seite mal durch den validator gejagt, und wie du bereits angemerkt hast, meckert es über die verschachtelte liste.
so ganz schlau werde ich nicht draus:
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Line 50, column 49: document type does not allow element "ul" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag
...euungsdienst mit den Bereichen <p><ul><li>Verpflegung</li><li>Soziale Betreuu
The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.
One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").
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Line 51, column 59: document type does not allow element "ol" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag
...le Arbeit mit den Bereichen</a><p><ol><li> Gesundheitsförderung </li><li
The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.
One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").