New guy Questions

[chemistrydropout]

I've been lurking around for a while now gleaning as much info as possible and I have a couple of questions that I can't seem to get out of my searches.
Using exclusively BBB method because I like it.

New Pool: 2 weeks with water in it. I've done all the start-up stuff myself with help from info on this site. Pool guy is a pool builder not a maintenance type. Not much help!
20X40 25000 gals IG vinyl
Numbers
TC = 3
Ph = 7.6
Alk = 70
CYA = 20-30 let's say 25
Ch = ?
Temp = 87

The cheapo Aqua-chem "Professional Test kit" just doesn't cut it for the testing stuff but it's getting me by right now.
Ok now for my questions.
(1) The first part of the Ch test turns blue in 2 drops to indicate hardness but the second part to clear only takes 2 drops to indicate a ch of 100 I think. Is this ok or do I need to do something with this number? Vinyl pool, no heater, no swg. I noticed that this problem has been hashed over thoroughly and a search of "Aqua chem" gave me the answer to this question which is my kit won't accurately tell me.
(2) I have been working on my alk # and have it up to 70 and it is holding ph well. Should I try to bump it up a little more just to get it "in range" even though ph is remaining stable.

Thanks in advance for the help and the great info on this forum!!!