Yes, I do this pretty often. Just today, I asked my brother if there was any jam because I didn't want to have plain bagel on my butter.
I didn't realize what I said until he looked at me funny.
I also often mix up syllables like you mentioned when you said "spill plitter". Sometimes when I mix up syllables, it sticks in my mind and I have to think hard for a second about how to say it properly.
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Your Aspie score: 159 of 200
Your neurotypical (non-autistic) score: 63 of 200
You are very likely an Aspie