form-item ID's already defined

As some examples, this errors are shown in XHTML validator... but there are more bugs:

admin/build/translate/import

line 85 column 27 - Error: ID "edit-mode-wrapper" already defined
line 82 column 53 - Info: ID "edit-mode-wrapper" first defined here

admin/settings/performance

line 74 column 27 - Error: ID "edit-cache-wrapper" already defined
line 71 column 53 - Info: ID "edit-cache-wrapper" first defined here
line 77 column 27 - Error: ID "edit-cache-wrapper" already defined
line 71 column 53 - Info: ID "edit-cache-wrapper" first defined here
line 94 column 27 - Error: ID "edit-preprocess-css-wrapper" already defined
line 91 column 53 - Info: ID "edit-preprocess-css-wrapper" first defined here
line 105 column 27 - Error: ID "edit-preprocess-js-wrapper" already defined
line 102 column 53 - Info: ID "edit-preprocess-js-wrapper" first defined here
line 114 column 46 - Error: value of attribute "id" invalid: "3" cannot start a name

such bugs are in 5.1, too.