Hope to read you soon,
First, thanks for your kind words on my blog.
As for your question, you would need to check with potential graduate programs to which you are interested to determine if it is possible to pursue a MArch without a bachelor degree -- my experience tells me that is unlikely.
However, given that you will have completed two years of bachelor degree in interior design, it would be possible to transfer to an undergraduate degree in architecture to either the BArch or the preprofessional BSAS.
At this point, I would suggest you contact some potential programs -- for a list of programs in the U.S., visit -- http://www.naab.org --.