I'm in the same situation. MS from US and B-Tech from India.
You need to know something. CIC doesn't understand non-Canadian credentials. So, CIC entirely depends on WES (or other ECA orgs) to evaluate your foreign credentials and calculate a Canadian Equivalency.
So, what you are looking for is, send your MS transcripts to WES ASAP. I did the same. So, WES now goes through your MS degree and looks at the university website where you got the degree from. If the university website (or whatever research they do) suggests that MS from that US university can only be obtained if the candidate successfully completes a 4 years Bachelor's degree, then you are in good shape. If not you might end up sending them your Indian degree too.
To summarize, if WES determines that your US masters is equivalent to Canadian Master's (Which I believe is mostly going to be true), then the assessment will say so and you will be awarded 23 for that.
WES received my Master's documents and they are reviewing them now. I'm in a little better shape compared to you, because I have my bachelor's transcripts handy just in case they request. But start the process ASAP.