Hi,
1/ Please provide details about your shipping configurations.
Without know what you have configured for your methods it will be hard for us to know what is going on exactly and what could be the issue (configuration or bug).
2/ It looks like a problem regarding the HMTL display.
If you use the browser inspector you'll see that the "+/-" are still there and should be visible. By changing a CSS value in the inspector, the buttons appear.
I don't fully understand the source of that issue but knowing that the content is there ; I don't think that's the problem related to an HikaShop behavior.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.