Help! Talk/Emailing Professors in the same program???

[JTspruell]

I initially sent emails to 3 professors at university XYZ who had projects that really interested me. I heard back initially from Professor #1, but nothing from #2 or #3.

About 3 weeks ago, I had a Professor (#2) at the university ask me if I am still interested in attending their program and to discuss research interests. We exchanged emails for a couple days and then he finished by let me know that decisions should be expected in a couple weeks. I haven't heard anything since. 

Today, I had Professor #1 emailing asking if I was still interested and that "I would NOT be able to say that I know I could accept you, but I do want to know if you are still interested, and if so I will move ahead on my end."

Should I let Professor #1 know I was emailing with Professor #2 about my attending and interests? Both professors have similar areas of research that are related and super interesting.