Can you please recheck if there's some error in payout? I had to receive 0.003 BTC according to week 17 spreadsheet but got only 0.00156.

Yep. Some errors in the payout. I've already informed the Coinomize team about it.
Lacking BTC rewards may be sent again today or the following week (depending on the Coinomize team); while the excess BTC rewards received by other participants will be deducted in their rewards on the following week.
For referencebc1qzfmx3g6svkt2d6yt40p3590yphaxhlhr5ex9fq Got 0.00084000 instead of 0.00192
* Lacking 0.00108
bc1qqsgsm8ahc2v5epc6al5vvstrmsj7yk0vkpa2k3 Got 0.00156 instead of 0.003
* Lacking 0.00144
bc1qu7gx7msv7x46my7zma95tjs7neu3rws4nrj9cp Got 0.00192 instead of 0.00216
* Lacking 0.00024
bc1qk6m9grqammfy2jcjvdympwkgunclvpeases8da Got 0.002001 instead of 0.002175
* Lacking 0.000174
bc1qkcnglxmm8hxr9lzxdk95e5jj3xcujag442zxgu Got 0.001475 instead of 0.002475
* Lacking 0.001
------------------------------------------------------------------
bc1qc5pzt5j8gfu7a8rrfzr0evlqr3jntjqe9rz54p Got 0.001475 intead of 0.001239
** Excess of 0.000236
bc1qcgz7decp44zu8d26gjceuef0myz6j3ccljp5dm Got 0.0045 instead of 0.0035
** Excess of 0.001
bc1q86rclrx6dme5zd9u4qnvl9e4p9wfnn4aj3pyka Got 0.0028 instead of 0.00168
** Excess of 0.00112
bc1qam9hf0h2g2nyht4drdkglegzlpltjdkdjd4pjf Got 0.001475 instead of 0.00118
** Excess of 0.000295