The VFIC plugin for DIM images has a bug. It detects 2HS images as 2HC and sets the wrong media flag in the header. Even worse if you convert such an image to another format the size is reduced to 1.2MB (2HC format).

To correct such an image open it in a hex editor and change the first byte from 02h to 01h.

Since all X68000 images in TOSEC have been converted to DIM format a few other games are also affected.
Check the 1.4MB images. If the media flag (first byte) is 03h (2HDE format) or 09h (2HQ format) then the image is OK. If it is 02h change it to 01h.