ctrl+/ creates snippets from selected
EDIT:
Sorry Thats how I DO it with my custom shortcut! Select All (Ctrl+A) Menu Edit>>Create VI Snippet from selection.
There is a optional input to the TDMS Write to define the data layout. The Default is "Decimated:0" Try "Interleaved" If that doesnt work Transpose the array
"Should be" isn't "Is" -Jay