Temple filler deep and superficial at the same time?

I move for work very often, so I'm forced to see different dermatologists or plastic surgeons for fillers and botox. I had filler injected deeply in November. Loved it and now, 9 months later, although some is still left, I'd like more. My new doctor injects superficially with a cannula. Is there any issue having filler left deep in my temples and injecting more now superficially? Just thinking about the blood vessels there. Thanks!

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