this is my network traffic with vnstat:

 ^                                                  r                          
  |                                                  r                          
  |                                               r  r                          
  |                                               r  r                          
  |                                               r  r                          
  |                                               r  r                          
  |                                               r  r                          
  |                                               r  r                          
  |                                         r  r  r  r                          
  |                              t rt rt rt rt rt rt rt                         
 -+---------------------------------------------------------------------------> 
  |  15 16 17 18 19 20 21 22 23 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14    

 h  rx (KiB)   tx (KiB)      h  rx (KiB)   tx (KiB)      h  rx (KiB)   tx (KiB) 
15          0          0    23      23994      40915    07    1305794     175924
16       8487       1375    00     129206     203168    08      95179      98313
17          0          0    01     147492     192614    09      96384     109808
18          0          0    02     199779     192173    10      95519     112443
19          0          0    03     206705     204136    11      77934      89830
20          0          0    04     264584     205402    12      66171      69969
21      47189      55511    05     292691     206276    13      80901      88811
22      31564      53650    06    1048066     187709    14       5890       2730

from 00 to 07 I was downloading using transmission bittorent from 08 to 13 I put download/upload speed limit on zero and nothing was downloading and at 14 I closed transmission bittorrent

there are two things I do not understand :

1. why is there still network traffic from 07 to 13 while I limited speeds to zero?
2. I limited upload speed from 00 to 07 but bittorrent has uploaded about 200000 KiB per hour

somebody please explain me why is this happening?

P.S

pausing torrents give same result as putting limit on speed, there is still traffic:
vnstat while bittorrent is open and all are paused

                          rx         |       tx
--------------------------------------+------------------
  bytes                      170 KiB  |         143 KiB
--------------------------------------+------------------
          max              68 kbit/s  |       52 kbit/s
      average           48.57 kbit/s  |    40.86 kbit/s
          min              36 kbit/s  |       28 kbit/s
--------------------------------------+------------------
  packets                       1562  |            1470
--------------------------------------+------------------
          max                 71 p/s  |          68 p/s
      average                 55 p/s  |          52 p/s
          min                 43 p/s  |          39 p/s
--------------------------------------+------------------
  time                    28 seconds

now I closed the bittorrent and results

                           rx         |       tx
--------------------------------------+------------------
  bytes                        3 KiB  |           4 KiB
--------------------------------------+------------------
          max               8 kbit/s  |        4 kbit/s
      average            0.96 kbit/s  |     1.28 kbit/s
          min               0 kbit/s  |        0 kbit/s
--------------------------------------+------------------
  packets                         32  |              40
--------------------------------------+------------------
          max                  7 p/s  |           7 p/s
      average                  1 p/s  |           1 p/s
          min                  0 p/s  |           0 p/s
--------------------------------------+------------------
  time                    25 seconds