four-order filter bandwidth and the two-order fileter bandwidth is same?
Your question describes two different cases:

1.) Answer to your first question: Of course, you can design a second-order bandpass as well as a 4th-order bandpass - both with a center frequency of 10kHz and a bandwidth of BW=2kHz. In both cases, the filter quality factor is Q=10/5=2. However, the attenuation properties of the 4th-order filter outside the passband are much better (slope of -40dB/dec instead of -20dB/dec). If the 4th-order filter consists of two 2nd-order sections, both stages are different.

2.) The information content given in the table is quite different: Here you assume that IDENTICAL 2nd-order bandpass sections are cascaded. In this case, of course - as outlined by Photon`s answer - the bandwidth will be reduced for increasing order (more sections).