That’s right. When you request a detailed quote to see the bid/ask, it shows the most recent or current price, which may not match what’s in your portfolio—it depends on the day’s trading volume.
When I ask for a detailed quote to get the bid/ask etc. I often find it's changed from what was showing on the portfolio. I really don't know if it's a coincidence, or if one, or the other, just doesn't update as frequently.
Market Data 
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