I typed my deck master's password but it is still "Waiting for valid monster ID..."

There's a couple of reasons for that:

• Are you sure the password is correct? Maybe you one of your digits is wrong, so please double check.
• Is the password for a monster card? Spells and traps can't be DMs, so their password, while valid, will be ignored.
• Has the card been recently announced? We retrieve cards from EDOPro's database, so if your card is not available there (normally just announced), it won't appear.

I have a lot of missing imports in YGOPRODECK.

There's a couple of of reasons for that and most cases it's not our fault:

• Has the card been recently announced? YGOPRODeck takes sometime to update new additions, so maybe the card simply doesn't exist there yet.
• Does the card have an official english translation? It seems there are a few cards with different names between EDOPro and YGOPRODeck, specially with OCG exclusive. For example, Clorless is named Colorless in EDO and so won't be found in YGOPRODeck. Since there's no official translation nor an way to convert between one and the other, there's not much we can do.
• Sometimes, the card is plain bugged. For example, most recipes simply don't work; if you manually add it to the collection, download the CSV and uploud it, the import still fails.
• Otherwise, it's probably our fault.