Stop panicking - there is no need. A date-order queue is a queue where the cases that arrived on the earliest date get seen and dealt with before cases that arrived on the next date, and so on, and so on. Like ChrisMwn answered you on another thread, it is not out of the ordinary to wait this long for your passport to have the visa label put in. The waiting time depends on how many people's cases were finalized just before yours - like queuing in the post shop behind people who walked in before you.