$("#table_level").html($("#table_level").html()+'<tr id="level_'+count+'"><td>'+symb(count,"cyril")+')</td><td><input name="level_'+count+'_value" type="text" style="width:100px;"/></td><td><input type="radio" name="check" value="'+count+'" /></td></tr>');
Вместо
$("#table_level").appendTo('<tr id="level_'+count+'"><td>'+symb(count,"cyril")+')</td><td><input name="level_'+count+'_value" type="text" style="width:100px;"/></td><td><input type="radio" name="check" value="'+count+'" /></td></tr>');