Vehicles seen in service, but not showing on bus times

[Jack]

2221 not tracking on the 17

[2206]

6826 not tracking on the X12/X13. Ran the 16:42 Chelmsley to Birmingham X13. 

[Danthebusman]

4831 not tracking on the 9:03 6A

[Jack6101]

Can't it mentioned but 823 isn't tracking 

[2206]

6855 is not tracking on bus times while on the X13. Ran the 20:10 X13 to Chelmsley Wood.

[PB50]

3304 was not tracking last night on the 7 service in Walsall.

[Danthebusman]

4986 not tracking on the 21

[PB50]

4734 not tracking on the 7 service today in Walsall.

[Danthebusman]

2169 not tracking on the 20A

[Jack]

6730 has stopped tracking on the 997

[BK63 YWP]

H1011 isn't tracking on the 51 

[Jack]

4486 not tracking on the 52.

[busboy31]

6927 and 6930 are not tracking as well, they might have been on the 9 since they last tracked.

[CL]

4822 not tracking on the 101

[BK63 YWP]

6927 and 6930 are not tracking as well, they might have been on the 9 since they last tracked.

Have you seen them? Shouldn't be posting this as an assumption (just taking the info from the website) as the thread states Vehicles SEEN in SERVICE BUT not tracking. They maybe having work done or not being used currently.