No x64 -glb no .exe files for office 2010/2013/2'16 are being downloaded.
I did a clean install on a Windows 10 computer with Office 2013 x64 thene ran the wsus offline but only downloaded SP1 for x86, I searched in all wsus offline tree for SP1 but I only found proplussp2013-kb2817430-fullfile-x86-es-es.exe, while x64 is missing. Besides not all office updates were downloaded, from a total of 180 (acording to wsus offline) I expected 90 for x86 and 90 for x64 but only 28 updates were instaled by wsus offline installer. Then I checked against Microsoft update online and more than 50 updates for office 2013 x64 were available.
There is no check box x86 nor x64 for office products. Only for Windows.