The following spell IDs in the learn steps of the First Aid guides are wrong and therefore the guide does not detect you learned them.
Reproducable by CTRL+ALT clicking through the guide with a character that has a high first aid skill, some learn steps are still red.
First Aid 1-525 guide:
The redirect at the beginning may throw errors due to missing 525-600 sections of the guide, I noticed the skinning guide doing this, first aid did not but I think this is because I don't have first aid above 500
Wool Bandage, should be 3277, guide uses 3530 which is the item ID of the bandage
Heavy Wool Bandage, should be 3278 instead of 3531
Heavy Silk Bandage, should be 7929 instead of 6451 (only Horde guide affected)
Netherweave Bandage, should be 27032 instead of 21990
Embersilk Bandage, should be 74556 instead of 53049
First Aid 525-600 guide:
IDs are correct but there's an error in the text, the guide tells you to create Heavy Embersilk Bandage instead of Heavy Windwool Bandage
Reproducable by CTRL+ALT clicking through the guide with a character that has a high first aid skill, some learn steps are still red.
First Aid 1-525 guide:
The redirect at the beginning may throw errors due to missing 525-600 sections of the guide, I noticed the skinning guide doing this, first aid did not but I think this is because I don't have first aid above 500
Wool Bandage, should be 3277, guide uses 3530 which is the item ID of the bandage
Heavy Wool Bandage, should be 3278 instead of 3531
Heavy Silk Bandage, should be 7929 instead of 6451 (only Horde guide affected)
Netherweave Bandage, should be 27032 instead of 21990
Embersilk Bandage, should be 74556 instead of 53049
First Aid 525-600 guide:
IDs are correct but there's an error in the text, the guide tells you to create Heavy Embersilk Bandage instead of Heavy Windwool Bandage