@cristamay Actually when I say "different portfolios" I meant entirely different websites, not just a different tab.
But to answer your question I don't think you're in danger of anyone thinking you're just trying to fill out your website. You're in danger of them thinking you have difficulty picking pieces and trimming down the count to curate a portfolio...
I used to have a "watercolors" tab and a "commissioned portraits" tab and a "prop design" tab for all my items and icons. It hurt my heart but I cut them all out. I still think they're some of my best work, but they're just not relevant. There was way too much stuff in my portfolio and I had to pick, so I picked children illustration and cut out all the rest. I draw 100+ new pieces every year for work, but only one or 2 of those end up making the cut for my portfolio. Cause the truth is not all your work should be there.
By the way when you apply to an agent, typically you send in 8-12 single images, and if they like your work they will ask you to submit all your body of work for a final review to see if they really sign you or not. So you still have a chance to show all your work. Just not in your portfolio. Your portfolio should be a curated collection that sells your services to a SPECIFIC client.