Request for Advice on Work Experience

Hello,

I'm a rising junior this fall from top 30 university who is preparing for IB summer internship next year. So far I've interned in ECMO in BB, top 5 listed VC over past 2 summers and will be interning at a PE firm abroad this summer, but there are worries regarding the internships that I've done :

First problem: duration of internships. Each of my internships went less than 2 months, and this makes me worry when I see my colleagues doing internships for more than 2 or 3 months. All internships were done in prominent firms, but shortly done. Would the recruiters doubt the validity of these internships compared to those who interned longer in lesser known firms? If so, what would be a good way to explain this potential shortcoming?

Second: having a possibly unfocused CV for IB. I've interned in bank, vc, pef(will in few months) in hope to acheive "IB-VC-PE" work experience, but recently my peer has referred to these internships as "tips of 3 icebergs". What are the good ways for me to appeal these experiences and what can I do more to stand against similar criticisms from IB recruiters?

Thank you for reading this over, and I sincerely appreciate your words of advice.