It sounds like you have more than one nsec. Likely the one in Alby is auto-generated. You can use it, but it's not connected to your same identity. It would be separate.
If your nsec is being stored in Coinos, there is a chance that it has been compromised:
nostr:nevent1qvzqqqqqqypzpw5qnyrxdmctda962pvng7ltzvjzjg09ge57dqqxfjn42ft2rcaxqyt8wumn8ghj7un9d3shjtnrda5kummn9e5k7tcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsqgycyrlr7zl7x9grdazwmjfp63q4l26pk5s7w2l8fej44xctyva69ya29zq7
Confirm that the nsec stored in Coinos is your correct nsec by putting it into Amber and using Amber to log into any Nostr app. If your correct "account" comes up, then Coinos had your nsec stored on their servers and it should be considered compromised.