Hello, I received admit from CMU for MISM (1 Year Track). They say it takes 6 to 8 weeks, after

Hello,
I received admit from CMU for MISM (1 Year Track). They say it takes 6 to 8 weeks, after document submission, to issue I-20. This track starts in May, that is around 10 weeks from now. Timelines seem to be very tight and risky. Any thoughts on this folks? Anyone planning to accept MISM 1 year track?