It seems there's gonna be a delay for
Kekkai Sensen. There's a pause in broadcasting for the weekend of June 27/28.
https://twitter.com/kekkaisensen/status/607577925634777089
Episode 10.5
https://twitter.com/kekkaisensen/status/607578141729517569
#11「paint it black」
 MBS:6/20(土)26:28~
 TOKYO MX:6/21(日)24:00~
 BS11:6/21(日)24:30~
※6/27(土)、6/28(日)は放送休止となります。
https://twitter.com/kekkaisensen/status/607578066865389568
#12「Hello,world!」(最終話)
 MBS:7/4(土)26:28~
 TOKYO MX:7/5(日)24:00~
 BS11:7/5(日)24:30~
Also the titles to these episodes seems to be references of Songs. With Episode Episode 11 The Rolling Stones - Paint it Black, Episode 12 Bump of Chicken- Hello, World.
Anyways the delay isn't a big deal because I rather have them take the time to get things right for the last 2 episodes than to stick something rushed just to get it on schedule. This could also mean a probable open ending for season 2.