If you're specced into Hunting Party (and other similar buffs such as Trueshot, and pet buffs) they're automatically added to your total but aren't selected as 'Yes' in the raid buffs section -- whether this is a bug or intended behaviour you'd have to ask Zeherah, not a huge deal if you know what buff your spec brings.

yes but , is tenacity =(

Does the hidden .5 second delay for hunter shots change with haste, or is it added to the cast time after haste has been accounted for?

I believe that is is tacked on after all Haste effects. The 0.5 hidden cast time will always remain 0.5 unfortunately.

Is there a consensus on what the value of CS glyph is? Plugging in various reforges and glyphs into FD, the numbers I get seem to diverge from the simulated results, e.g. I get a dps increase when removing the CS glyph and replacing it with the KS glyph, even though my haste levels dictate that I cannot sustain a CS-ASx2-SSx5 rotation.

In other instances, when I add enough haste to hit 9.75% from gear, I get less dps, with or without the CS glyph, compared to my current 793 haste.

Here is my FD page: Zeherah's Hunter DPS Analyzer
As you'll be able to tell, replacing the KS glyph with CS ends up as a 155.81 dps loss, where the MM guides imply that this should be a dps increase.

Note that any haste recommendations in the MM guide, if you are referring to those, is for the ideal case, with assuming no latency or reaction time since those vary from player to player. FD by default includes a 150 ms latency (but still no reaction time). Thus, to get FD to provide similar results, you need enough extra haste to account for the average effect of you latency.

Furthermore, the haste numbers in the MM guide are for a certain shot rotation. FD's rules do not necessarily implement those shot selections. They may match in some cases, but they often do not.

Does haste (both rating and speed) affect SV hunter dots (SS, ES, BS) thus making him more attractive for Dark Intent buff?

No Hunter dots are affected by haste (nor is Mend Pet). Hunters count as a physical class that get more from haste by autoattacks and resource generation.

The consensus is that CS Glyph is only a viable choice when you have the 4p T11 bonus. Your FD settings does not include it. Therefore going with Rapid Fire or Kill Shot should be better for the time being.

My guild is working on heroic Cho'gall right now, and I had a question about entrapment in that specific encounter. If both me and another hunter spec'd into entrapment and used traps on the Blood of the Old God adds would the entrapments DR on each other? Would the latter entrapment proc not work because of the one before it? That was two questions (sorry about that) but those are basically my two concerns.

The other hunter that is with me on the encounter uses entrapment, but i neglected to because I didn't know if DR/bugs would be a problem.

If our raid is missing the 10% attack speed buff, is it always a raid dps increase for me to stay SV, even if our only melee is 2 tanks and 1 DK/rogue?