Custom CSS being overridden

My table width is set to 100%. When I load page, the table flashes on at 100%, but quickly defaults to about 70%. What adjustments need to be made? Using up-to-date version of Chrome. OS X El Capitan ver.. 10.11.6

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Here is the CSS:

.tablepress-id-14 {
font-family: “Roboto Condensed”, Arial, sans-serif;
font-size: 17px;
}
.tablepress-id-14 thead th {
border: thin solid #444;
background-color: #dbddc4;
text-align: center;
line-height: 1;
}
.tablepress-14_wrapper {
width: 100%;
margin: 0 auto 1em;
}
.tablepress-id-14 .column-1 {
width: 8%;
background-color: #dbddc4;
}
.tablepress-id-12 .column-2,
.tablepress-id-12 .column-3,
.tablepress-id-12 .column-4,
.tablepress-id-12 .column-5 {
width: 23%;
white-space: nowrap;
}
.tablepress-id-14 td {
border: thin solid #444;
line-height: 1;
}