I have ripped files into WMA loss-less format using Windows Media Player 10.
(Files are in a two level directory structure book-name\disk-number\title.wma)
Opening the top directory in mp3tag v2.52 loads tags from all the 471 files.
Alt-T (Display Extended Tag) shows The following fields in the Metadata window:

Next, I do "Format value "SEQUENCE": $num(%_counter%,4)" action, then a tag to tag operation (selecting the field name TITLE from the drop down list):

Now the meta data has 2 TITLE fields:

And the Title Column in the display still contains the first title ("Track 1"), not the new second title ("000 d24 t01").
I've tried using Filename - Tag instead of Tag - Tag.
I've removed the tag using File/Remove Tag, displayed the empty metadata (Alt-T), and repeated filling the title field. The metadata shows one Title field (correctly set by the Filename - Tag operation), and the Title column in the display is blank.
And BTW, the drop down list for Field contains both "%TITLE%" and "TITLE". I tried one then the other, and either "%TITLE%" or "TITLE" was added to the metadata for the field name. Neither field name was used in the Title column on the display.
(At first I thought these were aliased for downward compatibility, but apparently not.)
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Here's right-click properties:

Windows Explorer also shows the first title field in the title column.
When I removed the tag and the added the file name, the metatdata window showed only one Title field. However, its contents were not displayed in the title column on the mp3tag display nor on the windows explorer display.
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My options for tags:










